tonight at ten — borisjohnson launches his campaign to become the next prime minister. he promised brexit by october, with or without a deal. delaney's defeat, delay means carbon. kick the can and will kick the bucket. the home secretary sajid javid has also set out his leadership pitch — the last of the 10 candidates to do so. tomorrow they all face the first round of votes. as we face the challenges like we have never faced before, as we face the challenges like we have neverfaced before, this calls for a new kind of leadership from a new leader. all 10 candidates now face the first round of voting by tory mps tomorrow. also tonight...

britain could become the first major nation to cut greenhouse gases to almost zero by 2050 under new government plans. police in hong kong use rubber bullets and tear gas as demonstrations of new measures to extradite suspects to mainland china turn violent. it has made people angry and you can see they are trying to break through police barricades over there. things are now being thrown. the whole situation has become a lot more tense. a lifeline for one of britain's biggest retail groups, arcadia, as landlords agreed to cut the rent for its stores. and a major new exhibit and from one of europe's greatest living artists, dame paula rego. and coming up in sportsday, a nightmare crash focused room. he is out of this year's tour de france after suffering multiple fractions

—— a nightmare crash for chris froome. good evening. the last two conservative candidates have launched their campaigns to replace theresa may as party leader and become the next prime minister. borisjohson, currently the front runner in the race, said he was determined to take britain out of the eu by the end of october. he said he wasn't aiming to leave without a deal but he would prepare for that outcome. meanwhile, the home secretary — sajid javid — said he was different from westminster elites and the country needed a new kind of leader. he and borisjohnson are the last of the ten candidates to launch their campaigns. tomorrow, conservative mps begin the first round of voting to decide who will move into downing street in six weeks' time. here's our political editor, laura kuenssberg. ah, here he is!

will boris johnson be the prime minister? boris! his dream for more than a decade. the waiting crush felt like the return of a long—lost unholy union — family in one corner, tory remainers and leavers again sharing the pews. hoping he can bring the slow—moving brexit crisis to an end. delay means defeat. delay means corbyn. kick the can again, and we kick the bucket. after three years and two missed deadlines, we must leave the eu on october the 31st. applause. time and again, he mentioned his double victory as mayor of london, pitching himself as the man to beat labour. injeremy corbyn, we have a man who is far to the left

of ken livingstone in his nihilistic determination to hike taxes to penal rates, to attack wealth creation. my friends, we cannot let them anywhere near downing street. he carries baggage, though — and plenty of it. mrjohnson, you suggested that brexit would be a straightforward win—win, and actually, it's been a chaotic mess. as foreign secretary, you offended people at home and abroad. you have a reputation for being cavalier with vital detail, and already in this campaign, you're telling some supporters you'll do everything to avoid leaving the eu without a deal, and others that you gladly would do that. it's a simple question — if you want to be prime minister, can the country trust you? well, yes, of course, laura, and the answer... i think perhaps in that great minestrone of observations, there was one substantive question which was that... one crouton i picked up,

which was that you think i have been somehow inconsistent. somehow inconsistent, laura, in saying that i don't want a no—deal outcome, but i think it is right for our great country to prepare for that outcome. and i think what most people understand... applause. if we make the preparations now, we will carry the conviction with our friends and partners that we are indeed able to make such an exit, if we really have to. he can'tjoke his way out of controversy, though. there were somejeers. as letterboxes and bank robbers... he was challenged on remarks made about muslim women and being fit for office. if sometimes in the course of trying to get across what i genuinely think, i use phrases and language that have caused offence, of course i'm sorry for the offence that i have caused, but i will continue to speak as directly as i can. not so direct when asked

if he'd ever used cocaine — he wouldn't answer. i think what most people in this country really want us to focus on in this campaign, if i may say so, is what we can do for them. it is borisjohnson's to lose, but there are plenty of others trying to shove him off the stage. the final launch today makes ten candidates in the race, other voices in the tory party ready to argue for change. now, this is a phrase that i've not used very often, but he's the man for me! the home secretary after the big promotion too. as we face the challenges that are unlike any that we have faced before, this calls for a new kind of leadership from a new kind of leader. a leader is notjust for christmas orjust for brexit.

we can't risk going with someone who feels like the short—term, comfort—zone choice. i'd say i am a change candidate. you know, borisjohnson is yesterday's news. not if he can help it, though. stop brexit! mrjohnson believes there are plenty more chapters in his story. there's a long way to go in this race. you cannot touch it! but whether you love to hate him or hate to love him, borisjohnson and the resistance he provokes will simply not be ignored. in a moment, we'll be hearing from laura, but first our europe editor, katya adler, is with me. what is the eu making of these candidates and their pledges? well, sophie, they are narrowing their eyes and trying to suss them out. they are politicians as well, so out. they are politicians as well, so they know when it comes to a leadership contest like this, there can bea leadership contest like this, there can be a difference between what these candidates may pledge, like definitely leaving the eu by the

sist definitely leaving the eu by the 31st of october and being willing to go for a no—deal brexit. what they may be thinking privately and what they would actually do if they were to become prime minister could be different. so they are game planning. who would state michael johnson be prime minister hunt or prime minister gove? and crucially, the eu wants to work out if any of these candidates could carry a co mforta ble these candidates could carry a comfortable majority in parliament for a withdrawal agreement, something which of course eluded theresa may. and that is because, as we know, eu leaders want to avoid an ideal brexit. so there is a bit of wiggle room if they think a wiggle could do the trick. and what do i mean by wiggle? they know that any new prime minister will ask for something on the back stop and actually, amongst eu leaders, there is more of an openness among some actually, amongst eu leaders, there is more of an openness among some to an end date to the backstop if push came to shove, more than they want to be known publicly. but only if dublin is agreeable and only if all eu leaders are 100% sure that would do the trick, that would pass the

withdrawal agreement through parliament and allow everybody to move on. those two ifs, from where we are sitting right now, are enormous and for now, eu leaders are convinced that amy came to an no—deal brexit, the uk would suffer a lot more than they would. meanwhile, laura, we have ten candidates who have made their pitches. what will the next few days bring? we finally heard from the frontrunner today but the big caveat is that it is only once we get down to the final round of voting which was not tomorrow that we will have a real handle on how the numbers are going to shake down, particularly as those with small amounts of support among their fellow mps get knocked out. where do their supporters then go? to whom of the big hitters do they move? who will then be able to change this race? today was the first time we have heard from boris johnson at length and while he says publicly very strongly that we are

leaving on halloween if he wins the race to become prime minister, whatever happens, even if that means leaving without a deal, looking around the room, it was full of conservative mps from right across the party, those who believe that leaving without a deal is the right thing to do because it is the quick way out, to unleash that frustration that many people feel that westminster has got stuck in this quagmire. but there were also plenty of people in that room who think that leaving without a deal would be a horrendous mistake. and that tells us a horrendous mistake. and that tells us that what boris johnson a horrendous mistake. and that tells us that what borisjohnson is trying to do is not to take a purist stance one way or the other in this debate, but trying to stitch together a coalition inside his party and around the country to try to find, guess what, some kind of middle way through. who, of course, has tried to put a coalition like that together before and found it very difficult indeed? together before and found it very difficult indeed ? the together before and found it very difficult indeed? the woman who is still in number ten tonight who borisjohnson seeks to replace. of course, theresa may and boris johnson our night and day when it

comes to their political characters. but ina comes to their political characters. but in a funny way, what we saw from borisjohnson but in a funny way, what we saw from boris johnson today was a but in a funny way, what we saw from borisjohnson today was a suggestion that he will in some ways try to steer the same kind of course, finding a way through, trying to keep different wings of the tory party on board. but we know from recent history how very difficult that proved to be, whatever the political skill and the political charisma and the political ability of the person trying to do so. laura and katya, thank you both. the prime minister has announced that the uk will commit to cutting its carbon emissions to almost zero by 2050, as part of a new government plan to tackle climate change. it would mean, among other things, millions of people switching from petrol and diesel cars to electric vehicles and taking fewer flights. if the plans are passed, britain would become the first major economy to adopt such a legally binding target. the move has been widely praised by green campaigners. but some fear it is already too late and an impossible task. here's our science

editor, david shukman. this is a huge moment in the effort to tackle climate change, a radical vision to shut off the gases that are raising temperatures. no more sights like this, of exhaust fumes pouring into the air, and no more gas burning in our homes for cooking or for heating. these are the men, and here is the metal. the country that led the industrial revolution got rich with the help of coal, but using it released carbon dioxide that's still in the atmosphere, and adding no more of it is one of the prime minister's final moves in office. well, i believe that we have a moral duty to leave this world in a better condition than what we inherited, and that's why today we are announcing that we will be ending our contribution to climate change by 2050, and legislating for a net—zero emissions target. so what is a net—zero target? well, it means running the economy without adding to levels of greenhouse gases.

offshore wind turbines are key to that, and there will be a lot more of them, and it also means making big changes in our everyday lives, like in this eco—house. first off, triple—glazed windows. and walls that are incredibly thick and well insulated. amazingly, this place has no central heating at all. instead, the natural warmth of the room is drawn off through these extractors, taken into this device, where it's used to heat up fresh, cooler airfrom outside, which is then warmed up, and released through this pipe up here. the result — a temperature of 21 degrees for virtually no power, and with technologies that are available right now. what about the cost of all this? if we're all going to switch to electric cars, for example, who pays for the chargers? the treasury is worried that the bills will mount up. supporters say cleaning the air will benefit everyone and reduce costs for the nhs,

but one of the teenage school protesters says everything's too slow. 2050 is far too late, unfortunately. we urgently need to actually take immediate action, rather than having this over the course of nearly 30 years. so what's the international view of britain's action? well, china is the biggest emitter of greenhouse gases, dwarfing whatever we produce. but it's also investing the most in clean technologies, with the world's biggest fleets of electric buses. even so, the chinese economy and others are set to quadruple in size, so whatever we do may not make much difference. global warming and addressing global warming is overwhelmingly about, how do you deal with four chinas, four indias, four africas within 30 years? oh, and another billion and a half people as well. a map of global warming — despite every effort, temperatures keep rising around the world, with the risk of the impacts becoming more severe.

britain hopes that taking a lead will set an example that others will follow. now, to put this in context, the world is currently adding more and more of the gases that raise temperatures. that's this line going up here. to have any chance of avoiding dangerous warming, those emissions need to be falling instead, either at this rate, or ideally this much faster one. in fact, the un climate panel says everyone should be close to zero emissions by 2050, not just the uk. and this matters because even a slight rise above the safe temperature level could see the global maize crop fall by 7%, risking malnutrition, 37% of the world population facing an extreme heatwave every five years, and the rise of the sea level, threatening hundreds of millions of people in coastal cities. that's why climate scientists welcome britain's move but say it's only the first step.

police have fired rubber bullets and tear gas at protesters in hong kong, where anger at a new extradition bill has spilled over into violence. the bill would allow the extradition of suspected criminals wanted for questioning or to stand trial back to mainland china. yet many fear this is an erosion of hong kong's independence. they're also deeply concerned about beijing's lack of human rights for suspects and think the new extradition bill could be used for political gain. china insists it is simply to stop people fleeing justice. hundreds of thousands of demonstrators blocked key roads around government buildings, today successfully delaying a debate on the proposed law change, amid the worst unrest in the territory for years. rupert wingfield—hayes reports. this was the centre of hong kong this afternoon. scenes of mass violence, the likes of which have not been seen here since the 1960s.

the day had been tense from the start. huge crowds surrounded hong kong's legislature, determined to stop any discussion of the hated extradition bill. the object of their anger, this woman — hong kong's chief executive, carrie lam. last weekend, hundreds of thousands of people took to the streets here, demanding she scrap a bill that would allow people in hong kong to be extradited to mainland china, but she is refusing to budge. why is she quite so adamant, quite so determined? you would call it arrogance on her part or stubbornness. no, she isjust doing all this at beijing's order. she is just some little puppet of the beijing regime. today's protesters were almost exclusively young, aggressive, and boiling with rage at a government they believe is giving away their freedoms.

it seemed only a matter of time before things turned violent. and so they did. few here have ever experienced the searing pain of being tear—gassed. you could see the shock and confusion. i think there's lines that we can have the freedom from fear, that we are every day facing right now, so i guess we feel angry and we do not get respected by our own government. by early evening, police had begun to gain the upper hand — launching barrage after barrage, driving protesters away from the government quarter. what we're witnessing here in hong kong tonight, with this operation to clear the streets, is a hong kong government determined not to allow another protest movement to establish itself and occupy the centre of the city, like it did back in 2014, and a government that is determined, it seems,

to push ahead with an incredibly controversial extradition law, regardless of the consequences. the government has now declared today's protest a riot, turning those who took part into potential criminals, but tonight thousands remain on the streets — their anger only further inflamed. well, it is now a little after five o'clock in the morning here in hong kong, and you can see the barricades are still up behind me here, although most of the protesters appear to have drifted away during the night, still i few hanging around here. the real question is going to come when the sunrises in about an hour's time — are the stu d e nts about an hour's time — are the students going to come back to the streets, are they going to try to block the legislative building behind me again, or is the fact that the police used such force against them on wednesday and that that protest has now been declared a riot, will not be enough to scare many of the protesters from coming

back to the streets here again? sophie. rupert, thank you. one of britain's biggest retail groups, arcadia, has been handed a lifeline by landlords who've agreed to cut rents for stores in the troubled empire. arcadia owns a raft of big names from topshop and dorothy perkins to miss selfridge. the business has 566 stores in the uk and ireland and employs 18,000 workers. simonjack is with me. so how much trouble is the company and, then? well, this afternoon, sophie, sir philip green's once mighty retail empire was on a knife edge, seeking approval from landlords to close some stores, asking them to accept a very steep discounts to the rents, and they did not get us through this last week, they tried it last week and didn't get permission. we know that one of the biggest landlords had vowed to vote against it, so it was really, asi vote against it, so it was really, as i say, a very tight vote, it went through in the end, so a lifeline

extended. i put it to sue philip green when i spoke to him on the phone earlier this evening that it was a very tight thing, here is what he said. it didn't come close to collapse — we won the vote. it was a legitimate vote, and it was won. we got a win today, and many more landlords clearly voted yes than no, right? one landlord wants to make a lot of noise, that's his choice, that's not my choice. so far as i'm concerned tonight, tonight's about a celebration for our workforce, our supply chain. and yes, the market's changed, now we've got to go to work, grasp this new marketplace and get on with the job. philip green there, and we should say it is not totally in the clear, there is a 30 day challenge period when some of the creditors can challenge the settlement, and there are some very challenging circumstances on the high street, so not home and dry, but for tonight the 19,000, not home and dry, but for tonight the19,000, 18,000 not home and dry, but for tonight the 19,000, 18,000 employees can breathe a sigh of relief, philip

green's empire is diminished but still intact. simon, thank you. a senior m15 officer has been telling the london bridge inquest why an investigation into one of the attackers was suspended for three months just before the attack. the witness identified as l says m15 was dealing with an alarming threat level at the time, putting pressure on resources. he defended the m15 investigation as "well run and effective." khuram butt was one of three men who killed eight people in 2017. daniel sandford reports. khuram butt, the leader of the london bridge attack which killed eight people. he first came to the attention of mi5 in 2014, three years before the attack, as an unnamed associate of the extremist preacher anjem choudary. but in the middle of the next year, 2015, m15 started a full investigation into him. witness l, a senior m15 officer, told the coroner, "we received a single strand of intelligence suggesting an individual had an aspiration to conduct an attack in the uk, and we were able to swiftly identify

that person is khuram butt." but as they started to watch khuram butt, m15 saw no evidence of him attack planning. what they observed were signs of continuing extremism. here he was praying in regent's park in front of a flag linked to the islamic state group. by the end of 2015, there were concerns he might travel to syria to join is. witness l said, "we stepped up his travel monitoring and put in place appropriate measures that, should he seek to travel, we would prevent it." so that he couldn't be seen by anyone in court, the senior m15 officer gave evidence from behind a thick green curtain. time and again, he was asked whether there should be deep public concern about the way m15 conducted their inquiry into khuram butt, but he said the investigation had been well and effectively run. three months before the attack, m15 had these pictures of butt meeting one of the other attackers, rachid redouane, but soon afterwards the investigation was suspended

because of a flood of more urgent investigations. witness l said, "in my 28 years, i cannot recall a time as alarming as this time." once the investigation resumed, m15 missed this meeting between the three attackers, having failed to get good intelligence from the gym where it took place. and witness l said that even if they had been following the men as they hired a van, they may not have realised it was the final preparations before an attack. daniel sandford, bbc news. the british champion cyclist chris froome has been ruled out of the tour de france, after what's being described as a very serious crash. chris froome's team said he crashed in the downhill section of a practice ride before hitting a wall in france. he was taken to hospital with a broken thigh bone, fractured elbow and ribs. she's one of europe's most important living painters. 84—year—old dame paula rego studied at the prestigious

slade school of fine art in london and in the 1960s began exhibiting alongside david hockney. a new exhibition of her work is about to open at the mk gallery in milton keynes this week. our arts editor, will gompertz, reports on an artist who through her work has also championed political and social causes. the artist dame paula rego, now in her 80s and weakened by a stroke, still goes to her studio almost every day. i think that if you do pictures, they are about what's inside you as much as what's outside you, but that you've got secrets and stories that you want to put out there in the pictures. her son, the film—maker nick willing, gave me a personal tour of this major exhibition of her work, which starts in the early days, when his mother's art was overtly political. she used, in the ‘60s, her pictures as a way

of undermining and criticising the portuguese fascist regime. my mother was very outrageous and took huge risks with her pictures and went crazy in her studio, as it were, in her work, but at home she was quite a straightforward person. in 1998, paula rego produced a set of large pastel pictures in response to a recent referendum held in portugal to bring an end to illegal abortions — an extremely dangerous practice of which she had personal experience. and my mother, who had suffered so much in her life from backstreet abortions, was so incensed that the portuguese public and particularly women in portugal hadn't bothered to go out and said, "oh, we're too embarrassed to vote," so she decided to lay it all out there and make a series of pictures of young girls,

some of them schoolgirls, who had had backstreet abortions. and that, in a way, gets to the heart of your mother's art, which is storytelling. this is sit, in a way that you tell a dog to sit. but this is paula being told to sit, so it is both obedience and defiance reflected in this picture. a paula rego picture is never straightforward — there's plenty of anger and suffering, but also tenderness and beauty. they are ambiguous, dark images and describe the human condition in a way few have done before. will gompertz, bbc news. that's it from us, now on bbc one it's time for the news where you are.

hello and welcome to sportsday — i'm chetan pathak. devastation for chris froome, as a serious crash ruins his dreams of a record equalling fifth tour de france title. 100% start from hosts continuous france when it began at the women's world cup.

and andy murray says he hasn't given up hope of playing singles tennis by the end of the year, as he continues his return from surgery. hello and welcome to sportsday. we start with the four time tour de france winner chris froome who is in intensive care tonight after a high speed crash ruled him out of this year's race. froome was practising for the fourth stage of the criterium du dauphine in france when he hit a wall and fractured his right femur, elbow and ribs. team ineos boss dave brailsford has been telling the bbc cycling podcast bespoke exactly what happened. it is at the bottom and came down it

isa it is at the bottom and came down it is a quite technical at the same time he came into a straight road, with housing on either side and he was with the well at the time and signalled to al that he was going to blow through it the finger on the side of one nostril clear the nose, and he gave the signal he took his hand off the bar to do that and it look like it was windy and dusty today, so that the of wind took his front wheel, and he lost control and went straight into the wall of the house basically. he went about 50 per ten hour and then stopped. his first on his been operated on like this so to make sure that first phase of medical care is optimal as possible and then manage it from there, so yeah it's concerning no doubt about it. that city manager speaking on the latest episode of

the cycling podcast available to download.