a this is bbc news. the headlines... turn down the heating, eat less meat, switch to electric cars, fly less — what we all need to do to slash greenhouse gas emissions by 2050. the prime minister says the case is closed after the defence secretary, gavin williamson — sacked over leaks from the national security council — labour demand a police investigation. in response to receiving the most brutal sacking i can think of, the memberfor south brutal sacking i can think of, the member for south staffordshire has protested his innocence, therefore this matter cannot be, as the prime minister says, closed. concern forjobs in belfast as it's announced one of northern ireland's biggest employers — the aerospace firm, bombardier — is being sold. a special report on the backlash against today's republican

dissidents in the wake of the killing ofjournalist lyra mckee. organisers of the london marathon are to conduct an investigation into claims some runners were called "fat" and "slow" and after polls closed an hour ago in the local elections in england and northern ireland, huw edwards will be the night as the results cothroughout me in. these are no normal elections, they ta ke these are no normal elections, they take place throughout england in the most turbulent political period since the second world war. what will it mean for the party leaders in westminster? join us tonight on bbc 14 election 2019.

good evening, welcome to bbc news. britain should drastically cut its carbon emissions over the next 30 years and lead the globalfight against climate change. that's the view of the government's independent advisers who say the uk should cut greenhouse emissions to virtually zero by 2050. scotland's target is five years sooner — that's because of the country's potential to plant more trees. but wales has five years longer — because of its reliance on agriculture. northern ireland doesn't have a specific target, because of the lack of government in stormont. today's report says we must all do our bit, suggesting we turn down the heating, eat less meat, take fewer flights and switch to electric cars. here's our science editor, david shukman. a heavy swirl in the north sea as we travel to a new wind farm. every swish of the blades generates zero—carbon power. until recently this was one of the most expensive sources

of energy, but breakthroughs in technology have dramatically lowered the costs, so in their report the government advisers say a sevenfold increase in offshore wind should be possible. this is a good day in the north sea. imagine what it is like building and maintaining turbines out here in all weathers, but the country is getting more and more of its electricity this way, and the report says we need to install thousands more turbines if we are to take climate change seriously. that will be a huge challenge. it was britain with the industrial revolution that first started pumping out the gases that have been raising temperatures. now the report says britain could lead the way to a cleaner future and help limit global warming. we are responsible for a great deal of the warming the world is now seeing, the climate change we are now seeing, but more than that we also consume a lot and those two factors especially

mean the uk really needs to go further and faster earlier. the advice is that we will keep driving cars but they should be electric by 2030. eating red meat is ok but ideally 20% less of it. flying will continue, the report says, but should not grow any more. and you should set your thermostat to 19 degrees in winter, assuming your home is well insulated. there is a glimpse of a low—carbon future in nottingham. they are drilling to install a new kind of heating for social housing. it draws warmth from the ground. the homes are also fitted with solar panels. in a communal energy centre there is a battery to store power. there is no need for gas. and monthly bills are far lower. joan warburton says it is a pleasure to live here. in the winter it was terrible, even in the summer i was sat here with dressing gown on and socks on and the doors are shut, now you can see the doors are wide open, they are always open. i don't have a dressing gown on now and i don't have my socks on.

i've never had socks on for 12 months so it's been great. last month, protesters demanded action on global warming. what do they think of the new plan? we are still living in the thing that if ijust turn the thermostat down, if ijust take one less flight, it is all going to be ok, and i think the truth extinction rebellion are telling everyone, this is not going to be 0k, stop kidding yourself. you will have to make fundamentally different choices. in any event, major change is likely. here, a new blade for a wind turbine is tested. it's a staggering 88 metres long. new designs like this mean it is plausible that by 2050 britain will not add any more to global warming, but the key question is what the government will do and whether it will agree to push for a zero—carbon future. helen clarkson is the ceo of the climate group — an organisation that works with business and government leaders around the world to address climate change. earlier, she told me how

achievable these targets are. what's great about this report is it really set out how ambitious we need to be, across all different parts of the economy. i think it's great to see the scope, or the underlying research, and to really push us. and we can achieve this, but what it's telling us is that we've got to do a lot and quickly. how is life like that have to change? it's a difficult question to answer, but broadly come in the next 20 years? we are going to see a lot of changes, the thing that is what the report tells us. we are quick to focus on the negative, but there is a lot of positive stuff there, and we know if we bring in electric vehicles, for example, we can deal with air pollution. if we switch to other forms of with air pollution. if we switch to otherforms of diet, with air pollution. if we switch to other forms of diet, we can do a lot for our health. so there is lot of benefits. and i think, looking at the changes we need to put in place, but also thinking about how those can make our lives better. and we are starting to see in the work we do with businesses, a lot of the

changes they're do with businesses, a lot of the changes they‘ re making, do with businesses, a lot of the changes they're making, there are seeing positive impacts. you can find out plenty more information about climate change and today's report on the bbc website, including our new jargon buster, which explains all the key terms. the prime minister says the case is closed after the former defence secretary, gavin williamson, was dramatically sacked yesterday over leaked details from a national security council meeting. 0ppositon parties have today stepped up their calls for a police investigation into whether the 0fficial secrets act was breached. gavin williamson denies being the source of the leak, which led to reports in the daily telegraph about plans to allow the chinese firm huawei to help build the uk's 5g mobile network. 0ur deputy political editor, john pienaar, reports. why haven't the police been called in over the leak, prime minister? 0ut she came today to greet a visiting leader and was greeted by this. are you certain you've got the right man, prime minister? and this. is mr williamson a liar?

and this. was there a kangaroo court, prime minister? nothing more to say, but yesterday she judged and condemned gavin williamson — just a day after he denied he was the guilty man. absolutely not. but he has admitted speaking to the daily telegraph, after the national security council discussed giving china's huawei corporation a hand in building britain's 5g network. he denies leaking that. now, career wrecked, future blighted, he's not going quietly. he's told journalists, "it was a witchhunt from the start in a kangaroo court." "it's the pm's attempt at a show of strength," he told another. "i couldn't have volunteered more information." and to yet anotherjournalist, "i swear on my children's lives that i'm innocent." but to the government today, it's an open—and—shut case. the prime minister has said that she now considers that this matter has been closed, and the cabinet secretary does not consider it necessary to refer it to the police,

but we would, of course, co—operate fully should the police themselves consider that an investigation were necessary. and the message to ministers? members should speak with complete candour within the room and shut up when they get outside. not so fast, says the government's opponents. the prime minister has sacked the secretary of state for defence because she believes there is compelling evidence that he has committed a crime. but despite that, she does not believe he should face a criminal investigation. where is the justice in that? and some tories want to be sure the case for the sacking was airtight. natural justice demands that the evidence be produced so that his reputation can be salvaged or utterly destroyed. doesn't it?! could itjust be possible that the kangaroo court has made a mistake? to critics, though, it's cabinet conduct in the dock. some members just have completely

swept aside any scraps of decency and honour in the pursuit of blatant personal ambition. no ifs or buts, this matter has to go to the police. but there's been no sign the police will be called in. a court case must show beyond doubt that secrets were damagingly betrayed. far simpler for mrs may to decide, on what she'd been told, she no longer trusted her defence secretary, and if ministers are somehow persuaded that destabilising leaks must stop, she won't mind that one bit. and gavin williamson, never shy, often on social media, he wasn't always friendly as he sometimes looks. close to mrs may and then as chief whip, he learned the secrets and stories deep inside government. tonight, he's posted this. looks harmless, but he could still cause trouble for the pm who's sacked him — as if she needed more. john pienaar, bbc news, westminster. lord kerslake is the former head of the civil service.

he gave us his thoughts on the way gavin williamson was dismissed. we've got to be clear here that the test for the prime minister was whether there was enough evidence to say she had lost confidence in his capability to be a minister, and she concluded that she had. that is very different from the evidence you might need to take a criminal investigation forward. it's clear now that the metropolitan police will not get involved unless they are invited. and the prime minister has no intention of inviting them to investigate this. that will surprise a lot of people, that the police wouldn't automatically come and have a look at this, because we are talking about the official secrets act. why is that? we are but we got to be clear here that the offence, such as it is, is really about the source of the leak, the national security council, rather than the substance. it's hard to argue that

the substance of the league —related damage to national security. the second point, prosecutions under national security are very, very rare under this act. so this would be unusual. and i think the third point is the evidence test for a criminal prosecution is beyond reasonable doubt, and i don't think, despite how compelling the prime minister says the evidence is, that this reaches that test. the canadian aerospace firm bombardier has announced it will sell off its plants in belfast, as part of a worldwide restructuring programme. the company is northern ireland's largest manufacturer, employing around 3500 people to build aircraft wings and other parts. bombardier says it's committed to finding the right buyer. unions insist that the government should step in if one can't be found. john campbell reports. this morning's announcement came as a surprise to many bombardier

workers. but it's not a total shock. bombardier has been reshaping and shrinking its aerospace business in recent yea rs. shrinking its aerospace business in recent years. it's all been part of an attempt to recover from huge financial losses run up as it developed its c series jetliner. the wings for that pain are made in belfast. until now, bombardier‘s most dramatic move had been to sell the cc project to airbus, the giant european plane maker. but the decision to sell the home northern ireland operation is perhaps an even more radical step. trade unions help a new owner can mark a new beginning. i think if i had a new owner can mark a new beginning. i think ifi had been sitting here three years ago and we've been talking about closure of belfast bombardier, it was on the verge of bankruptcy, and that's where it was, over c series at that point in time. so hopefully this gives us an opportunity to grow. and when we say grow, women with real

jobs, real advantages and giving in people in this society they hope to come through. —— we mean with real jobs. snow maxim who might buy it? a major attraction -- so who might buy it? it might draw the attention of global engineering firms. for example, gkn, a british company which already works closely with bombardier. this aircraft business is owned by china public state aviation company. perhaps it could bid for bombardier‘s operations. they say that whoever is interested will make their voices heard in this process. we will be closely watching the interest, and if we see rogue elements, people looking to come in and asset strip or take a plate to this work first, we will cause hell. the company says it is committed to finding the right buyer, one that

will operate responsibly. an inquest has ruled that a burglar who was fatally stabbed by a pensioner in his home was lawfully killed. 79—year—old richard 0sborn—brooks described how he stabbed henry vincent with a kitchen knife at his home in south east london, after being threatened with a screwdriver in april last year. mr 0sborn—brooks was initially arrested on suspicion of murder but was later told no further action would be taken. richard lister reports. henry vincent's mother and sister arriving at court today, still furious that no—one has been prosecuted for his death. vincent was wanted in connection with another burglary when he went to the house at hither green, armed with a screwdriver. he left it fatally injured. stabbing. they are trying to revive him but i think he's gone. richard 0sborn—brooks was holding the knife that killed him. the inquest heard today that, when threatened by vincent, the pensioner held up his own weapon, saying, "mine is bigger than yours, and if you do not leave my house, you

will be sorry." police initially arrested the 78—year—old on suspicion of murder before releasing him with no further action. but he received death threats which meant he could not return home. outside the house in the days that followed, the vincent family put up tributes to the man who had gone there to threaten and stealfrom a pensioner. the tributes were quickly taken down by other residents and the police had to intervene. it prompted a nationwide debate about the fine line between murder and self—defence. at vincent's funeral, feelings ran high and there were threats made againstjournalists but the coroner confirmed today that the 37—year—old was lawfully killed. richard lister, bbc news. the governor of the bank of england says interest rates could go up more frequently than expected in the next few years. it's currently being held at 0.75%. the market had been expecting just one or two interest rate increases by 2021, but mark carney said if brexit is resolved, and inflation and growth continue

to pick up, then more increases are likely, affecting the 3.5 million people with variable or tracker mortages. a fresh inquest is to be held into the death of a nine—year—old who died after suffering from an asthma attack in 2013. the original inquest concluded her death was caused by acute respiratory failure and severe asthma, but her family says new evidence proves her death was directly linked to illegal levels of air pollution near her home in south london. ella was cheeky and bright, says her mother. here she is playing with her phone in their car. there little cough a sign of how ill she was. a few months later, she had a severe asthma attack and died. i'm going home today. her home was just 25 metres from london's busy ring road. she was breathing air so polluted that it broke legal limits.

pollution wasn't put as a cause of ella's death, but her mother has always believed that it was linked and now she is one step closer to finding out. today at the high court, a judge said in the interests ofjustice there should be a new inquest. we spoke to rosamund after the ruling. it's incredibly important. i loved her so much, so, so much and i'm so proud of her, that she is doing this for everybody else. even you and me, because we all breathe air. ella was rushed to hospital almost 30 times in the three years before she died. new medical evidence, key to today's decision, showed a striking correlation between these visits and spikes in air pollution. we've known for many years that air pollution and asthma go together, but what we haven't had are clear demonstrations of individual human beings suffering as a direct result of this pollution.

the government says it's taking concerted action to improve air quality. ella's family will have to wait a yearfor the inquest, but it could prove without doubt that illegal air pollution can kill. claire marshall, bbc news. the wikilea ks co—founder julian assange has formally begun his legal battle to avoid extradition to the united states to face computer hacking charges. he told a court by video link from prison that he would not surrender voluntarily to the us authorities. he's serving a 50—week sentence for breaching bail conditions after spending nearly seven years in the ecuadorian embassy in london. police in northern ireland say that any witnesses to the murder ofjournalist lyra mckee will be offered anonymity, if they agree to give evidence against her killers. she was shot dead two weeks ago while observing a riot. the dissident republican group the new ira said its members killed her. the killing has sparked a backlash against the hardliners, who continue

to launch attacks more than 20 years since the signing of the good friday agreement that ended the troubles. 0ur ireland correspondent emma vardy reports from londonderry on the efforts to stop the violence. # we shall live in peace, we shall live in peace...# the spectre of an old conflict still haunts this city. now, derry is trying to heal new wounds. the violence which led to the death of lyra mckee was orchestrated by so—called dissident republicans. they see themselves as part of a decades—old struggle against british rule in northern ireland. i would just say to them, lay down your arms. stop the whole thing. i would hope that they would take that on board. and this is the public face

of modern day dissidents, a legal political party known as saoradh, irish for liberation, who oppose northern ireland's peace process. police say saoradh are the political voice of the new ira — with a significant overlap in the leadership of the two organisations. nobody wants you, nobody! now, the headquarters in derry have become the focus of a backlash. in the wake of lyra mckee's death, saoradh have had their account closed by twitter and have faced repeated calls from people to shut down their operations here. the group haven't responded to any of our requests for an interview, but in a statemen on their facebook page told people they wouldn't be going away. as 11 men were convicted in derry this week for an illegal republican parade, we caught up with the prominent dissident and leading member of saoradh, seen here in the bluejacket, thomas ashe mellon. mr mellon, we're from bbc news, we've got a few

questions about saoradh. many people in derry don't want your organisation here, mr mellon. what do you have to say to them? people see you as having endorsed the violence which killed lyra mckee, mr mellon, how do you justify that? how do you justify that, mr mellon? you say you represent the community, but the community here have made it very clear you're not welcome. another problem, mr mellon, youth workers tell us that what saoradh does is deliberately target young people with your propaganda and that helps encourage people to go out rioting. you don't really care about their welfare, do you? is that responsible? saoradh is a very vocal organisation at times, very vocal on social media, what do you have to say to people today? people feel dissidents like you are

just trying to drag northern ireland back to the past. isn't that what you're doing? any words for lyra mckee's family? saoradh says it played no role in the death of lyra mckee. police have promised that witnesses who can identify the gunman will receive protection. the new ira, and their supporters, represent a tiny minority in northern ireland, but with new blood coming through their ranks, their presence will be difficult to erase. 0rganisers of the london marathon are to conduct an investifation into claims some runners were called fat and slow by contractors and race marshalls. the claims were made by an official race pacer who was told to complete the course in 7.5 hours, as emma jones reports. it was a day enjoyed by thousands, but for some, the experience was very different. for the first time, the london marathon had recruited

people to pace—set those who would take over six hours to complete the course. and the volunteer looking after those expected to finish in 7.5 hours was this woman. i don't know if you can see, but there's a sweeper behind me. i'm under a 17 minute—pace, and he's throwing detergent all over me. this is how london marathon treat their pacers. by the time we got to about four miles, we were fighting off coaches and big, orange chemical—carrying vehicles. for the next 22 miles after that, it was an absolute mess. runners were told there were too fat to run, if they were slimmer, they would run faster, it's a run, not a walk. it was horrendous, coming from all sides. runner said they had to dodge collection lorries and run through chemical spray being used to clean the streets, with one woman telling the bbc her blister has now developed into a chemical burn. the organisers say the marathon

is a huge logistical operation and they have now launched an investigation. it will take time, but we will be very thorough with that, find out what went on, because we want the experience to be an amazing one for everyone that's participating. the accusation is contractors, some of the marshals on the course, were telling some people they were fat, they were slow, they shouldn't actually be taking part in the marathon. that's embarrassing, isn't it? we have to do this investigation and go into great detail. normally, we have the most incredible marshals, volunteers, contractors, who are delighted to be working on the event and have done so for some time. it is normally one of the most amazing experiences that you can have. you get cheered on by crowds, it is as if you are running on a sea of positivity. what i've heard is the antithesis of that, and that is not an experience that i would want

anyone to have. voters went to the polls for local elections in england and northern ireland today, and the hashtag #dogsatpollingstations began trending once again on social media. it's proved as popular as ever, as owners and their four—legged friends spotted photo opportunities not to be sniffed at. finn the cocker spaniel wanted to show his snout at the polling station in windsor. labradoodles hotch and penny were up early this morning for a trip to the polling station at folkestone central. five—year—old nelly, a border terrier cross, was promised cheese if she stood nicely for a picture. barney the labrador exercised his democratic right this morning in wallasey, merseyside. scooby‘s favourite kind of polling station is one where he gets petted and given treats. that's probably most of them! darren says his dog woody the dachshund had fun

voting in brighton. michi the japanese spitz was very happy to be out at the polls this morning. and poppy the chocolate labrador wore an impressive bandana to mark the occassion. we would all cheer up if we had dogs at polling stations everyday! but that would mean an election to often, for most. in a few moments, huw edwards will have a special programme on those local elections in england and northern ireland. before that, though, let's get some sport. good evening, here's your latest sports news: arsenal hold the advantage in their europa league semifinal first leg against valenica. ——first leg against valencia. two goals from striker alexandre lacazette and another from pierre—emerick aubameyang giving them a 3—1win at the emirates tonight, heading into second leg. joe wilson reports. arsenal's season comes down to this.

two legs of a europa league semifinal and then the chance of a trophy. the club has my priority has changed course towards azerbaijan. —— has changed priority. this goal, so —— has changed priority. this goal, so easy —— has changed priority. this goal, so easy even a manager —— has changed priority. this goal, so easy even a manager could —— has changed priority. this goal, so easy even a manager could score! well, valencia's manager thought so. so arsenal because my defence is dodgy but what about attack? wherever a babby and runs, lacazette is sure to follow, there he is. —— we re is sure to follow, there he is. —— were aubameyang. watch this header, he was convinced it had crossed the line. and goal—line technology told the ref it was in. just 25 minutes gone, by the way. lacazette had ample opportunities to score again. instead of the net, he hit neto, the valencia goalkeeper. with the clock

ticking, the chance fell to the other half of the double act, aubameyang. 3—1 with a second like to come. now, which way to the final? chelsea have a crucial away goal after drawing 1—1 with german side eintracht frankfurt. after an early setback, they recovered thanks to pedro's goal. patrick gearey reports. if you haven't heard of frankfurt, what you see them, you will not forget them first. this club is built on both. frankfurt went flying into chelsea. their star striker steered them in front, queue thousands of rapidly overheating frankfurters. gradually, they lost stea m. frankfurters. gradually, they lost steam. chelsea had left their star eden hazard on the bench, a decision that would have been questioned at half—time had pedro not found an a nswer half—time had pedro not found an answer just before hand. half—time had pedro not found an answerjust before hand. that was the bridgehead for chelsea's second half advance. darren louise tried to channel messy, so close—run so far.

—— channel messi. 0n came hazard to join the raids. the keeper was there but so, just about, were frankfurt. still, davitt abra ham but so, just about, were frankfurt. still, davitt abraham might have snatched it. as it is, chelsea are favourites. but things are rarely black and white. it's been a great day for british cyclist jacob hennessy in wet conditions at the tour de yorkshire. the tour set off from doncaster and this year's route takes in eight host locations including halifax, barnsley, doncaster and leeds. he won both intermediate sprints and the only climb of the day. a netherlands cyclist won the further sprint after a long—range break way to ta ke sprint after a long—range break way to take the opening stage. it finishes on leeds —— in leeds on sunday. we're into the semifinals of the world snooker championships in sheffield and favourite judd trump is level at four frames

all after his first session against qualifier gary wilson. wilson showed his intent by knocking in break of 140 to go 2—1 up. but trump — who reached the final in 2011 — fought back to level it. they resume at 2:30pm tomorrow afternoon. david gilbert has opened up a 5—3 lead overjohn higgins in the other semifinal. gilbert trailed 3—2 at one stage, but hit back and was on course for a maximum 147 break in the sixth frame. he potted all 15 reds, but missed the last black before the colours. that's all the sport for now. hello, bank holiday weekend just around the corner and of course you wa nt to around the corner and of course you want to know what is the prospect. it won't be a reflection of last year which was a record breaker, on mayday we had a high of 29 celsius. we might be breaking records this may day but for a different reason,

it could be disappointingly cool with some places in temperatures below the average for this time of year. if you want somebody to blame, don't blame the forecasters, blame this cold front that is slipping its way south and west as we speak and it is going to open the floodgates for this cold air to spill out from the north. the ice of ours squeezing together, the winds are significant feature as well, particularly in the far north of scotland for friday. it's going to be a windy day. friday is the transition because the cold front will be sinking its way south and west, bringing a blanket of cloud, if you spits and spots of showery rain across south wales, central and southern england. behind it, brighter conditions, scattered showers and perhaps even wintry to the predominantly higher ground in scotland, and windy with it. so a contrast in the temperatures for the south seen temperatures into double digits, 13—15. the north of the front, noticeably colder,

particularly factoring in the wind and particularly on exposed east coasts. so that coding will continue to push south and actually, for the start of the weekend, he could see a widespread but white frost. so that will be a shock to the system. so that northerly wind could drive in some showers of the north sea coast and they will push further inland. sheltered western areas will see the best of the drier and perhaps brighter weather and temperatures will reflect that, a windy day, quite cool, perhaps highest values on saturday of around 10—13 but a lwa ys on saturday of around 10—13 but always on that east coast, particularly factoring in the wind, it will be disappointing. but high pressure will build from the west, really, through sunday into monday and that will quieten things down a little bit. it will kill off those showers and the winds will fall lighter still. so on sunday, a good deal of dry weather, there could be scattered showers in the north and he still a noticeable strong wind

but elsewhere, some cloud around but predominantly dry, a good day for getting out and about and temperatures 9—13. but with lighter winds, it may feel that little bit better. we have already established that bank holiday monday will be disappointing in terms of the feel of things, but again, dry for many. so again, a good day for getting out and about. and if we look further ahead, you can see we have been lucky in some respects. i know we are desperate for rain but low pressure looks likely to bring wet and windy weather into the second half of next week, living across the country into scandinavia and then it potentially could be replaced by another significant glow. plenty of isobars, winds are significant features, gales possibly for some in the south. and it looks as though we keep the blue tones for much of the bee, potential temperatures a little disappointing. a lot to play for with the position of the lower, in terms of where we are going to see

the rain and winds. but it's worth bearing in mind, a dry start of the week then turning wet and windy and it could be cool for the early part of may.