this is bbc news. i'm lukwesa burak. the headlines at 3pm... hundreds of thousands of people are marching through central london, demanding another brexit referendum. meanwhile, theresa may warns mps a third meaningful vote may not take place next week if it doesn't get "sufficient support". american—backed kurdish forces declare victory over islamic state after capturing the group's last remaining stronghold in syria. a 17—year—old is stabbed to death following a fight outside a block of flats in west london. us special counsel robert mueller submits his report into alleged russian collusion with president trump's campaign during the 2016 presidential election. researchers in london have produced these unprecedented images of a baby's heart whilst it's still inside the womb.

and, with ukraine's presidential election just over a week away, we take a special look at some of the personalities behind the campaigns. that's in half an hour, here on bbc news. good afternoon. hundreds of thousands of people are taking part in a march and rally in central london, calling for another brexit referendum. the demonstration, which has been organised by the "put it to the people" campaign, is now gathered in parliament square, where speakers have been addressing a rally. the organisers have estimated that up to 1 million people are taking part. it comes after the eu agreed to delay the uk's departure from the eu.

the prime minister, theresa may, is coming under pressure to quit after saying she might not put her brexit deal to a third vote by mps. our political correspondent pete saul reports. whether it's to be or not to be, many believe another referendum is the only way forward. it's still growing, but this could become one of the largest protests this country has ever seen. their argument is clear — if parliament cannot resolve the issue, why not put brexit back to the people? i never wanted to leave in the first place and ijust think i have no faith in the government being able to run the country. we should have a say, now that everyone knows what the deal is, we should have a say on what the future of the uk should be. we've got to a shambles where we're one week before and even the house of commons, even may does not appear to know what deal she wants. the chances of another referendum appear slim, though. most mps are opposed, including the prime minister. after the eu give her

a new timetable for brexit, theresa may is fast running out of options. in a letter to mps, she admits there might not be a third vote on her brexit deal this week if it appears there is not sufficient support. the numbers are against her and there is little sign of them changing. tensions are running high, including within the government. one minister says he would resign if the uk asked for a longer delay. i cannotjustify going to my constituents and explaining why we have not left the european union. others believe the prime minister's time is up. she has to go. i'm not saying the government should go — that's the last thing we want — but she has to go and we need some temporary prime minister who can reach out, put the country first, get this back to the british people. that is what we are marching for today, a people's vote. as the crowds swell in central london, mps are preparing for another set of votes. the idea is to work out

what they are for, rather than what they are against. but whatever they choose might be too much for the government to stomach. next week could be key to the future of britain, and of our prime minister. peter saul bbc news. our correspondent richard lister is in central london with the marchers. we understand that the march actually had to move off early because what has been described as high—density crowds. there could well be significant numbers on the streets of london today. well be significant numbers on the streets of london todayi well be significant numbers on the streets of london today. i think thatis streets of london today. i think that is indisputable, there are very significant numbers. i was at green park earlier and before that up at marble arch which is where the tail end of the beginning of the march was a living from and that is a good 45 minutes walk from where we are now. between that point and here was actually solid with people. it is fairto actually solid with people. it is fair to say we are talking about the hundreds of thousands. getting into the numbers business is clearly very

political. there is still debate about how many people took part in the last one of these matches in october, with police saying at the time something around 700,000 or even 750,000 was about right but since then brexiteers have said that was a grossly inflated number and it was a grossly inflated number and it was only about half a million but still, half a million people is a very significant turnout. if we look at the stop the war rally, which is reckoned to be the largest march we have seen in london at this century, that was reckoned to be about a million people in 2003 and certainly the organisers of this march are very hopeful they will exceed the turnout from last october and they would like to break the million barrier as well. we came here talking behind you, what sort of things have been said so far? who have we seen on the stage? i know we are waiting for key speakers. we have had a whole string of politicians, the last was david lammy of the labour party and before

him we really had representatives from all of the main parties. we had justine greening from the tory party, annie soubry, the former tory who is now part of independent group, ian blackford for the snp, phillip lee from the tory party and jo swinson from the lib dems. a lot of politicians saying what this group wants to hear, that it is time that the option of what we do next is put to the people of the uk, two yea rs is put to the people of the uk, two years after the last referendum. they say it is time, three years after, that we go back to the british people. there is some debate among people here about what process that should be, whether, for example, mps support an amendment in parliament next week which would see the support of theresa may's vote, on the provision it would be put to the people. some are in favour of that but others say it should be the same question i was asked first time round but the consensus is that

there needs to be another vote. we will leave it there for now but we will leave it there for now but we will be back with you through the afternoon. thank you. meanwhile, one of the government's key plans to deal with the potential impact of a no—deal brexit is being put in place this weekend. the m20 motorway leading to the port of dover was closed overnight. contingency plans are being made in case long queues of lorries build up as they try to cross the channel. a new road layout will be in place from monday. us—backed kurdish forces say they've defeated islamic state militants and conquered their last, small foothold in syria. syrian democratic forces have been fighting the remaining jihadists outside the village of baghuz. let's just take a look at how their territory has diminished. back in january 2015, the areas marked in red were under the control of the group. but since then, it's slowly declined

as islamic state were pushed back, and over the course of the last four years, their control has dwindled. and by the start of this year, they only held a few small areas of territory. recent fighting has focused on the area near baghuz, and today us—backed forces in syria claim they've taken back that final strip of land. the sdf‘s announcement of a victory marks the culmination of a weeks long final assault on baghuz, a small piece of territory where thousands of fighters and their families had been holed up. aleem maqbool has this report from northeastern syria. the official declaration finally came from the syrian democratic forces, that the so—called caliphate had been totally eliminated. we congratulate the syrian people, but particularly the syrian democratic forces on the destruction of isis's fraudulent caliphate, and for the liberation of isis's remaining territory in eastern syria.

it followed a massive offensive earlier this week on the last stronghold of the islamic state group in the town of baghuz. local forces have since been involved in mopping up operations, fighting militants who were hidden in tunnels, clearing unexploded ordinance and booby—trapped devices and also, it appears, removing what are estimated to have been many hundreds of bodies. while people in this region have been celebrating the territorial defeat of is, there is clear recognition that this is by no means an end to the threat posed by the group and the fight against it will go on. well, this has been a huge achievement that has taken a great deal of sacrifice but people here are very mindful of calling this just a territorial victory against the islamic state group, knowing that the fight against them and their ideology will go on into the future. aleem maqbool, bbc news, in northern syria. the prime minister has also been talking about this today.

she has issued a statement in which she says... a teenager has been stabbed and killed in west london. scotland yard say the victim, believed to be a 17—year—old boy, was found seriously injured after reports of a fight outside a block of flats in union lane, isleworth. earlier we heard from our news correspondent jane—frances kelly from the scene. a crime scene tent is still behind me, that is where the teenager was found last night. officers were called at about 10:35pm after reports of a fight. they found a 17—year—old boy with serious wounds, stab wounds.

they gave him first aid, an ambulance arrived, but he was pronounced dead at the scene. the detective fronting the investigation said that the teenager earlier had been at nearby syon park with a group of people and that a car pulled up, a group of males got out and they chased him from syon park to this block of flats where the attack took place. the mayor of london, sadiq khan, who is on the brexit referendum march, has been talking about the stabbing. i've been in touch with the commissioner and it's heartbreaking. it's a 17—year—old boy who's lost his life because of a knifing. and my thoughts and prayers, as i'm sure those of londoners are, are with his family. the police are following a number of lines of enquiry. there is currently a section 60 in place. that means, in that area, the police are able to stop and search anybody without the need for reasonable suspicion to see if they could be carrying a knife or an offensive weapon.

there are extra resources in isleworth, in that part of london, and i would say to the public, if anybody knows or has any information at all, there is no honour in staying silent. there is a family that is grieving now and they are bereaving because of this death. please contact the police, you can ring 101, or crimestoppers anonymously. residents say they are utterly shocked. normally this is a very quiet place to live in. they have been describing what they heard last night. i went out about ten o'clock last night because there was a group of youths under my flat and i asked them to keep their voices down because i was going to bed. they were very apologetic. then, about half an hour later, i heard a bit of commotion and i looked out my window, getting ready to ask them to be quiet and it was the police with a police dog, right outside our flat. and then we came down and they said there had been a serious assault

and woke up this morning and it was a fatal stabbing. i wouldn't expect this, especially in some quiet type of estate. we are all a bit shocked and terrified about our children and ourselves. so hopefully this will not happen again. this has shaken residents. the police are appealing for witnesses, people who were here and also at syon park last night. the mother of libby squire, the hull student whose body was found in the humber estuary on wednesday, has paid an emotional tribute to her "beautiful girl" and said no family should have to endure what hers has gone through. the 21—year—old's body was found seven weeks after she went missing, following a night out on the 1st of february. humberside police is treating her death as a "potential homicide". writing on facebook, libby's mother, lisa squire, said she'd lost one of the most precious things in her life, and that her heart is broken. she said that it was an "honour,

privilege and a joy" to have been libby's mother, that she kept her safe as long as she could, and that she was "so sorry" she could not keep her safe on the night that she vanished. in the united states, democrat politicians say the public must be told the findings of the investigation into claims of collusion between donald trump's election campaign and russia. special counsel robert mueller submitted his long—awaited report yesterday. now the attorney general is deciding how much to share with politicians in congress, as our north america correspondent, david willis, explains. i have no idea about the mueller report. i'm going to florida... he'd reach there, in fact, by the time the most highly anticipated report of his presidency was delivered. news that robert mueller had concluded his investigation of russian interference in the 2016 election came in a letter to

lawmakers from the attorney general, william barr, who said he was reviewing the report and may be in a position to advise them of the special counsel's conclusions this weekend. the enigmatic mr mueller, who was once head of the fbi, has spent nearly two years looking at allegations of collusion between the trump campaign and the kremlin during the 2016 election. in that time, he's brought charges against several trump aides such as the former campaign chairman paul manafort — people with ties to russia but whose convictions were for lying or financial wrongdoing, not plotting to subvert the outcome of a presidential election. the usjustice department says no further indictments will be issued, so is that because a sitting president can't be indicted, or is it because mr trump was telling the truth all along? the question now for the attorney general is how much of the mueller report to make public. all of it, say the democrats, and quickly.

attorney general barr must not give president trump, his lawyers or his staff any sneak preview. announcer: the president of the united states... the mueller enquiry began just four months into donald trump's presidency and has cast a shadow over it ever since. but did it unearth evidence of wrongdoing on the part of the president himself? we may be about to find out. david willis, bbc news. the headlines on bbc news... hundreds of thousands of people are marching through central london, demanding another brexit referendum. meanwhile, theresa may has written a letter to mps, warning a third meaningful vote won't take place next week without "sufficient support" for her brexit deal. and in other news, american—backed kurdish forces declare victory over islamic state after capturing the group's last remaining stronghold in eastern syria.

and wales will have to play their opening euro 2020 qualify without aaron ramsey who has not recovered from a thigh injury and will not play against slovakia tomorrow. second placed saracens updating harlequins in the rugby union premiership at the london stadium. 15 minutes gone and harlequins are leading 3—0. the most lucrative gett tournament in the world, the indian premier league, it's up and running with royal challengers bangalore losing early wickets against defending champions chennai super kings including moeen ali who was out for nine. i will be back with more on those stories and more at about 5:30pm. bbc news has learned that the family of mark duggan, who was shot dead by a metropolitan police officer, is suing the force for damages. an inquest jury found that he was lawfully killed. the shooting in north london in august 2011, led to riots across england.

keith doyle reports. the family of mark duggan have campaigned for the police to be held responsible for his death. mr duggan, who was 29, was shot and killed by officers who were trying to arrest him in north london in august 2011. the police said at the time they suspected he was in possession of a firearm. the killing lead to the worse riots seen in britain for 30 years. for five nights shops were looted and set on fire. five people died and hundreds were injured. trouble spread to other cities, including manchester, liverpool and birmingham. the inquest into mark duggan‘s death heard that armed police had intercepted a minicab he was travelling in, as part of an arrangement to collect a gun. he was shot when he got out of the cab. the inquestjury concluded he was not holding the gun when he was shot, but said the killing was lawful because police honestly believed he was and he posed a threat.

campaigners say the inquest left unanswered questions about the police operation. mr duggan‘s family now wants scotland yard to be held liable for his death and to pay compensation. scotland yard is defending the civil claim but says it is inappropriate to comment. keith doyle, bbc news. there's growing anger in mozambique over the pace of the relief operation to help those affected by cyclone idai. the area around the port city of beira has been largely cut off and aid charities are warning of the threat of diseases like cholera. earlier our deputy africa editor anne soy, who is in the capital, maputo, explained what's gone so wrong with the relief operation from a busy port. there is a big humanitarian effort under way here in mozambique. the

ship behind me is being loaded with 2000 tonnes of food supplies, water, clothing and all things that the people who have been cut off by water will need. the situation in central mozambique remains dire with tens of thousands of people still stranded more than a week on. they desperately need to be rescued and taken to desperately need to be rescued and ta ken to safer desperately need to be rescued and taken to safer ground. there are reports from flooded areas, the helicopters getting people trapped off the rooftops of houses and wanting them to safety but this is a slow process hampered by bad weather. it has been raining in the region effected by the cyclone. across the border in zimbabwe, a similar situation. the rescue effo rts similar situation. the rescue efforts are continuing. in malawi i'm told that 80,000 people are in camps and they need food, they need

medical supplies, their needs are immense. but the response to these disaster has been growing by the day. the local people have come together to support those people who have been effected. the international community is also responding. the donations have been growing by the day but the biggest challenge, whence they get them to the ground, is how to distribute them because the cyclone destroyed them because the cyclone destroyed the infrastructure and it is very difficult to get the emergency supplies people so desperately need to them. scientists have been able to produce detailed picture of a baby start while it is still in the womb. scientists say the technique could help treat congenital heart

diseases. this is the view inside the womb, and doctors are using images like this to inspect the foetal heart. violet—vienna developed life—threatening abnormalities in the blood vessels around her heart while she was still inside her mum. but doctors spotted them early and planned how to save her life. she was put on medication as soon as she was born and had heart surgery a week later. if a routine pregnancy scan identifies a problem then women are sent for a detailed mri scan and a series of pictures of the heart are taken. sophisticated computer software pieces those images together and then builds an unprecedented 3d image of the heart. about eight in every thousand babies in the uk is born with a congenital heart defect. and this research is enabling doctors to look at them in incredible detail. and importantly, it's improving care for babies. it allows us to have a beautiful 3d image of the abnormality so we have

complete certainty and plan ahead for what treatment is needed, what's the operation that we need to do? violet—vienna was one of the first to benefit from these 3d scans, and the researchers hope the technology that helped her will soon become routine. james gallagher, bbc news. the al noor mosque in christchurch as we eight days after the fatal shootings they their fault of heavily armed police continue to guard the building but small numbers of worshippers are being allowed in. thousands of people marched through christchurch last night in support of those affected. earlier, i will gave us this update. eight days ago, the al noor mosque was the scene of mass murder. 42 of the 50 victims died at the al noor mosque, and today the police handed it back to the muslim community. it will remain the epicentre for the community's grief, but there is a sense that this is a very symbolic step forward. across the road at hagley park here in christchurch, 5000 people marched in what's known as the march for love.

this event, organised by three 16—year—old high school students, another powerful act of solidarity eight days after the attack. further north in new zealand's biggest city, auckland, the prime minister, jacinda ardern, has addressed the country's biggest mosque and she's brushed aside global praise of her compassionate and decisive leadership during this tragedy here, saying that she's simply been echoing the humanity of all new zealanders. soldiers have been deployed on the streets of paris today to protect public buildings in case of demonstrations by the so—called "yellow—vest movement". protests last saturday descended into violence and shops and businesses were looted. paris police have banned the protesters from a large area in the west of the city, including the champs—elysees.

these are live pictures from today some of the bands have effectively shone silly so that what you can see is the basilica of the sacred heart of paris, the well—known sacre coeur. it is relatively calm at the moment. we have seen the band affecting the arc de triomphe and they have been put in place in other major cities but so far, peaceful scenes from the sacre coeur area of paris. a new type of satellite tag for tracking birds of prey is being trialled at the cairngorms national park in scotland. over the next 18 months some young golden eagles, like the ones seen here, will be fitted with the raptor tracker tag. it's hoped that the new technology will provide better information on the birds' movements and help to curb wildlife crime.

let's go live to inverness where we can speak to robbie kernahan, from scottish natural heritage, which is involved in the project. thank you for speaking to us. just how necessary was this tagging scheme? we have been tagging golden eagles and birds of prey in scotland for a number of years and they provide really useful insight into how birds move, both in space and time, but these particular tags give us time, but these particular tags give usa time, but these particular tags give us a much more fascinating are perhaps detailed insight into the movements of the birds. they are majestic and we get a better idea of how they spend time foraging and feeding and ultimately their fate. really interesting and insightful project. how healthy is the golden eagle population at the moment? the population in scotland is doing really well generally. we have over 500 breeding pairs in the scotland and over 80% of the territories are

occupied. that is a really good news story and a good conservation success story but there are still challenges. it is not a national picture, there are regional variations and we still have some issues about habitat quality and prey base in the west highlands and in the southern uplands. recruitment of young birds is a bit of an issue. in the cairngorms particularly and in the eastern cairngorms, there is an ongoing concern about raptor persecution and that is where these tags will come into their own. they will give us specific real—time feedback about what is happening to the birds and if anybody is killing them illegally, we will know exactly where and when it is happening. when you say you will be collecting data such as killing them, does it monitor the health of the bird or is it more location data? what the tax do is they use a new type of satellite network, geo station iridium is what it is called, and

the key difference is that these tags monitor real—time. traditionally, satellite tags, which had provided us with fascinating insight into how golden eagle moved and where they spend time, the key difference is that this will be real—time feedback so there are multiple sensors on the board and we will get a better handle upon their resting and feeding and foraging but also if anything untoward happens to them. if they are stuck in a trap or indeed if they are shot. that in effect could send a distress signal straightaway. it would allow people like ourselves or the national wildlife crime unit or police scotla nd wildlife crime unit or police scotland to investigate more thoroughly any potential criminality and that is a big step forward for us, both in terms of enforcement of potential wildlife crime but also it sends a strong preventative message as well. these are birds of prey and they are pretty large as well. how would you go about putting the tags on them? they are one of our largest birds of prey and hugely iconic. it

isa birds of prey and hugely iconic. it is a very skilled process and there are only a select few individuals in the country who are trained and able to do it. it is done on young birds at the nest, very skilfully, and eagle welfare is pretty fundamental but we have a lot of experience of fitting the tags. the new tags are at the same size as the type we were using before but the type of data they will generate in terms of the feedback i think will be really helpful and just better in understanding if any criminality is taking place and we can investigate that more thoroughly than we have been able to do in the past.|j suppose if it is successful, it will be rolled out to other wildlife but when does your trial go live? we are hoping to start the trial pretty much this spring and for the next 18 months we will be fitting the tags ona number of months we will be fitting the tags on a number of young birds throughout the kim ghattas national park and over the next 18 months and are selling how well they are performing cashback at the cairngorms national park. these are still at a prototype stage but hopefully it sent a strong message

to anybody out there in scotland, in the national parks specifically, that wildlife crime is not acceptable. golden eagle and raptor persecution must be stamped out, it has no place in modern day scotland and this sent a strong message and hopefully a deterrent to anybody who thinks that raptor persecution can continue. the scottish government andindeed continue. the scottish government and indeed scottish natural heritage have advice to government that we are have advice to government that we a re clear have advice to government that we are clear that we want to stamp this out and the technological advancement are one of the tools that will help those efforts. thank you very much forjoining us. the m5 is currently closed in both directions between j1 and j2. the central motorway police group says it believes an old unexploded device has been found underneath the motorway by a member of the public. updates on that right here on bbc news. a father—of—three has scaled penner—van — the highest peak in south wales — for the 365th time in