this is bbc news. the headlines at 11:00: new figures show knife crime offences in england and wales have increased by two—thirds — we have a special report from a hospital on the front line. i hope it'sjust a blip. i worry there's a change in attitude towards knife injury. following the death of this teenager in a road accident, in northamptonshire, the uk calls on the us to waive the diplomatic immunity of the american woman who's the main suspect. the businesswoman alleged to have been offered favours by borisjohnson when he was mayor of london, refuses to deny they had an affair. as american troops withdraw from northern syria, the us's main allies in the fight against the islamic state group,

the kurds, say they've been stabbed in the back by president trump. and more than 200 arrests in central london, as climate activists take to the streets. as part of a worldwide protest against global warming. and at 11:30, we'll be taking an in—depth look at the papers, with our reviewersjohn kampfner and katy balls. stay with us for that. good evening. we start tonight with a special report on the relentless increase in knife crime across england and wales. police say they're struggling to contain the problem not only in london, where the problem is acute, but also in other areas. the trauma team at the royal london hospital, in the heart of the east end,

is one of the busiest in europe, with experts dealing with the effects of knife and gun attacks. my colleague clive myrie was given exclusive access to their work over a period of several months, and this is his extended report. this the pained face of knife crime in britain. still early, the guys aren't even tipping out the pubs yet, and absolutely anything could happen tonight. these are stories over a three month period, from the front line of the epidemic. when he came in, he'd lost a lot of blood volume, his pulses were very weak. stories of courage, kindness and honesty. let's face it, it doesn't take much to get stabbed in our society today, bottom line. arterial bleeder there. stories of cowardice, and for some, immense strength.

we got a phone call that my son had been stabbed. they'd just stabbed him. 0h... this is 16—year—old lucas. at approximately 16:30 he's been allegedly assaulted by a group of people, and sustained a single incision wound to the left upper quadrant. lucas perry has been stabbed in the chest. one of two knife victims admitted to the royal london hospital this evening. his painkillers haven't kicked in. they've just got to open him up and see where the knife‘s gone, what it's hit, and take it from there, really. there's lots of things that could go wrong. it's absolutely awful. consultant martin griffiths will soon operate on lucas. he's stable, but nothing's certain. how you doing? i'm right here, open your eyes, look at me, take my hand.

what's your name? lucas. how old are you? 16. and what happened to you? i got stabbed. the attacker‘s knife pierced his liver and punctured his stomach, after lucas refused to hand over his bike and phone to a group of teen robbers. martin is a veteran of the violence, but even he's shocked at what's happening now. we know we're seeing a lot more, about 10% rise year on year, and we get the feeling we are seeing more complex wounds. what do you think is going on then, what is going on out there? i hope it'sjust a blip. i worry that there's a change in attitude towards knife injury, that people are becoming better educated on how to cause more damage. the attacks are no longerjust random slashes but targeted strikes, designed to permanently maim or kill. it's late at night and martin's on duty again.

just named nhs violent crime reduction chief for london, his role is to help society better understand why some carry knives, to reframe the debate, to save lives. let's strip away convention, let's strip away what we expect to happen in our lives, let's strip away the resource, shelter, warmth, comfort, parenting, structure. let's introduce chaotic parenting, inconsistent food, inconsistent shelter, no aspiration, and a group or society around you in which that behaviour is the norm. and put around that a big fence. peoplejudging you and deeming you as being worthless. let us give you no access to get out of that place. let's see how you behave. what will happen? it's going to be explosive, it won't be positive.

we are dealing with a generation that are angry, disheartened, that have been neglected, that are let down, that no—one really cares about. roisin kerville is part of martin griffith's team. an outreach worker based in the hospital, she can offer the direct support some families need as patients recover, to prevent young people turning to violence. if you've got a parent who is substance misuse or mental health orjust domestic violence, you cannot nurture that child as much as that child really needs nurturing because you're consumed with whatever you are holding as an adult. does it depress you? yes. you seeing this all the time? oh, it breaks my heart. victims admitted to hospital can seek revenge on their attackers and end up needing further treatment. but her work and that of colleagues has cut readdmitance rates to the royal london for 45% tojust 1%. all of you been traumatised by this. all of you. lucas is ok.

but what about his family? if you look all right, you're probably not all right. yeah. 0k. it's going to be a long process. you all right? ten days later his family tries to heal, as lucas gets better. how you feeling? i'm all right. but will he seek revenge on his attackers? if you're walking along the street and you see them, what's going to happen? obviously i'd want them to go through that, i'd want them to feel what i feel, but i wouldn't stab them. and not seeking to stab his attacker mayjust save his own life. on any given day in britain, a knife attack will intrude on a young life. the youngest to die this year 1a. how best to give our youth a chance, to end the pointless waste, we're still figuring out. clive myrie, bbc news. the prime minister has urged the us to reconsider giving a diplomat‘s wife immunity

after she left the uk, despite being a suspect in a fatal road crash. harry dunn, who was 19, died when his motorcycle was in a collision with a car, near an an raf base in northamptonshire. anne sacoolas left the uk despite telling police she had no plans to do so. duncan kennedy has the details. harry dunn was just 19 when he was knocked off his motorbike last august. he died of multiple injuries. it happened not far from this american air base in northamptonshire, when he collided with a car driven by the wife of a diplomat who worked at the base. that driver was anne sacoolas, pictured here on her wedding day in 2003. but within two weeks of crash, she and her family returned to the united states. this is the neighbourhood near washington dc where they own a home. it was her decision

to leave britain, despite being a suspect in a fatal car crash, thatt today led to the prime minister to intervene. i do not think that it can be right to use the process of diplomatic immunity for this type of purpose and i hope that anne sacoolas will come back and will engage properly with the processes of law as they're carried out in this country. the intervention of the prime minister comes six weeks after harry died here on this roadside in northamptonshire. the air force base where anne sacoolas drove out of is just 200 yards down the road. harry's family say they welcome the move by borisjohnson and say they hope it'll bring real pressure on the american government. harry's parents said today that, while they're not seeking a long jail sentence for anne sacoolas, they are finding it hard to forgive her. it was an accident,

we know this, she didn't mean to kill our son, it was an accident, i can forgive herfor that but forgive her for leaving? we'd have tried to get her a suspended sentence, so she could have carried on being a mum. so that she wasn't taken away from her own children. but forgiveness for leaving — i'm nowhere near. northamptonshire police today said the absence of anne sacoolas is frustrating their investigation. it's difficult when the suspects have left the uk and obviously causes delays in the investigation, but we are making really hard to make sure we gather all the available evidence that remains for us. the foreign secretary has spoken with the american secretaryof state. what started as a tragedy on a quiet english country road has become an international cause of division and heartache.

duncan kennedy, bbc news. the american businesswoman, jennifer arcuri, has insisted she never received favouritism from borisjohnson,, when he was mayor of london, but she refused to say whether they had had an affair. mrjohnson insists he did not break any code of conduct whenjennifer arcuri's company received grants, and she was included on trade missions. she made her comments in an interview on itv this morning. our special correspondent, lucy manning, reports. i hope you're having a productive... just what was it about the charismatic student, jennifer arcuri, that attracted borisjohnson, then mayor of london, to support her technology events? i'm ready to hang out, yes i am! yeah! boris is hanging out! mrjohnson‘s been accused of a conflict of interest, after she got public money and was allowed on trade trips he led. you like hanging out with us, right? i do. i'm always happy to hang out. today, she had her say, although six times she refused to say if they'd had an affair. the answer that i'm going to give is now being going to be weaponised

against this man. it's really categorically no one's business what private life we had or didn't have, and, categorically, more important, boris never, ever gave me favouritism. never once did i ask him for a favour. never once did he write a letter of recommendation for me. he didn't know about my asking to go to trips. mrjohnson‘s also refused to say if they did or didn't have a relationship. it's notjust a personal question, the business woman got £26,000, went on three trade trips and later her company was awarded £100,000 from the culture department. absolutely nothing to do with mrjohnson, she insisted. did you ever have any intimate relationship with borisjohnson, yes or no? because the press have made me this objectified ex—model, pole dancer i really am not going to answer that question. so you won't deny it? i'm sorry.

ms arcuri says borisjohnson visited her at her flat here in east london five, ten, a handful of times. there are now four investigations to see whether mrjohnson helped her to receive any funds or access to trade trips. the london assembly has given him until tomorrow night to provide any e—mails or documents. if he doesn't, then they could summons him to appear. if he ignores that, then it could be a fine or even prison. the prime minister had little to add. reporter: did you break the gla code of conduct? no, and i've said i think everything i'm going to say on that matter. ms arcuri said they had a very close bond. labour says she should have declared this. he has a duty to declare his relationship with ms arcurie. he had a duty to make that declaration under the code of conduct, which he needed to have abided by. jennifer arcuri has spoken,

but the prime minister still has questions. lucy manning, bbc news. a retired high courtjudge has accused the police watchdog of "shocking failures", in its investigation of what went wrong during the metropolitan‘s police inquiry into an alleged paedophile network at westminster. 0peration midland ended without any arrests, after one man, carl beech, made a series of false allegations against public figures. the head of the met, cressida dick, apologised again today, and the police watchdog defended its decision not to recommend disciplinary action against any of the officers involved. us troops have started to withdraw from northeastern syria, with president trump defending the move, saying it was time "to get out of these ridiculous endless wars". it opens the way for a full—scale turkish assault against kurdish fighters, who are regarded by the turkish government as terrorists.

but the syrian democratic forces, or sdf, led by the kurds, had been the americans' main allies in the fight against the islamic state group, reducing areas under is control to virtually nothing. yesterday, president erdogan and president trump said they would set up a 20 mile so—called "safe zone" along the border, in order to combat what they call "terrorists" and help the return of millions of syrian refugees currently in turkey. the sdf were shocked by the move and called the us withdrawal a stab in the back. 0ur international correspondent 0rla guerin reports from the border. a pull out at dawn. us troops, leaving observation posts along the syrian border. washington says only a small number of troops were moved a short distance. but kurdish forces fear they are clearing the way for a turkish invasion.

turkey's president was viewing serbian troops today, an honour guard on a state visit, as concerns grow internationally about what he is planning for northern syria. before leaving home, he seemed ready for unilateral action soon. "we talked to the americans last night", he said. "and we keep talking. we have made a decision. and as we always say, we might come suddenly one night." that's a major threat for these kurdish fighters from the sdf, the syrian democratic forces, who have fought street to street against islamic state with help from the us. they have been washington's key allies in battle.

but with the us pull—out, they believe they're being thrown to the wolves. they have vowed to resist any offensive, and defend their land at all costs. their spokesman, mustafa bali, told us that an attack by turkey risks giving is sleeper cells a chance to regroup, and even retake some territory. from president trump, a bellicose warning, via his usual undiplomatic channel. "if turkey does anything that i, in my great and unmatched wisdom, consider to be off limits, i will totally destroy and obliterate the economy of turkey." just last month, american and turkish troops were carrying out these joint patrols at the border. but now ankara intends to go it alone, taking the battle to kurdish forces is views as terrorists and a threat to its security. the pentagon may be voicing concern, but washington has no intention of getting caught in the crossfire.

0rla guerin, bbc news, on the turkey—syria border. the headlines on bbc news: new figures show knife crime offences in england and wales have increased by two—thirds. following the death of this teenager in a road accident in northamptonshire, the uk calls on the us to waive the diplomatic immunity of the american woman who's the main suspect. the businesswoman alleged to have been offered favours by borisjohnson when he was mayor of london refuses to deny they had an affair. thousands of climate change activists have been on the streets in cities around the world at the start of two weeks of global protest. the campaign is being co—ordinated by extinction rebellion and is calling for urgent government action to stop rising carbon emissions. in london there were more than 250 arrests as protestors blocked

bridges and roads in the city centre. 0ur chief environment correspondent justin rowlatt has the latest. there wasn't much the police could do as vehicles blocked key junctions and protesters swiftly chained themselves underneath. careful, mate. we're trying to shut central london to draw attention to the climate and ecological violence. go, go, go! but officers drew the line when activists tried to set up a kitchen — yep, sink and all — in the middle of trafalgar square. this was a numbers game. there were hundreds of police. there are no official numbers yet, but thousands of protesters. campsites and kitchens quickly sprang up in the heart of government. there was even an impromptu wedding on westminster bridge. cheering and applause it brought parts of central london to a standstill. everyone's going to lose money. i might as well go home now.

my day's finished. i ain't going to earn nothing, am i? it certainly was disruptive. it took hours for police to unglue protesters from this scaffolding tower. and how would you cut this guy free from his hearse? not everyone agreed with the tactics. i think you're hysterical extremists and you are alienating public opinion and they ain't going to turn off their lights until you ask them individually. celebrity supporters defended the action. this is a movement for everybody, this is not about party politics, it's not about brexit, it is bigger than that. and it wasn'tjust london. extinction rebellion protests included a mass lie—in in mumbai, road blocks in berlin, actions in new zealand, and in dublin, too. the crowds are thinning out now, though some activists do plan to sleep over, despite the rain. but it's unlikely to be comfortable,

especially when you are chained to a friend. what are your plans for the night? to stay here, keep the strand blocked, yeah, keep the blockage. aren't you worried the police are going to come and arrest you in the middle of night? no, a cell might be a bit drier than this. # we are getting stronger by the hour... and remember that guy in the hearse? he's still there, though now his passenger is wearing the bike lock. one of the co—founders of extinction rebellion says these dramatic gestures are needed. people have got to get their heads around how serious this crisis is. it's not going away. justin rowlatt reporting. the former conservative mp heidi allen is the latest parliamentarian to join the liberal democrats. the mp for south cambridgeshire, who has been sitting as an independent after leaving the change uk group injune, takes the lib dem tally in the house of commons to 19. the media regulator 0fcom says it has found no evidence that the bbc presenter naga munchetty broke impartiality rules by speaking on air about her experience of racism in light of comments made by president trump.

but 0fcom said it had serious concerns about transparency in the bbc‘s complaints process. a woman has been taken to hospital with serious injuries after being thrown from a ride at hull fair. humberside police have said they believe she fell from one ride onto the base of another, striking a teenager on her descent. they don't believe her injuries are life—threatening. the nobel prize for medicine has been won by a british scientist and two americans for their research into how human cells respond to the availability of oxygen. their work is paving the way for new therapies for serious diseases. here's our medical correspondent fergus walsh. just for a moment, the serious work of science was put on pause at sir peter ratcliffe's laboratory, at the university of oxford. in true nobel fashion, sir peter had no advance warning of the prize. ifound out this morning,

as my secretary catherine came through the door, into my laboratory meeting, with an anxious look on herface, and suggested i talk to someone from stockholm. so what was your reaction? well, delighted, honoured, a little bit surprised this morning. obviously this is a great tribute to lots of people in my lab, the people who helped me set it up, the people who have been there for years, the people who are there now. the 2019 nobel prize in physiology and medicine... sir peter shared the award with american scientist william kaelin and gregg semenza for their discoveries on how human cells sense and adapt to the availability of oxygen. for elite athletes like dina asher—smith, powering her way to gold at the 200 metre world championships muscle cells are perfectly calibrated to get maximum explosive power.

for mountaineers at high altitudes, oxygen levels can be dangerously low, akin to what patients experience in intensive care. discovering how the human body adapts to extreme situations has many medical applications. most human diseases are complicated by low oxygen, we call it hypoxia, that includes heart disease, anaemia the primary target now, cancer in a slightly different way. we're right on the threshold of hearing the outcome of trials in the us, in europe, injapan. sir peter's share of the prize money is nearly a quarter of a million pounds. he says he has no idea how he will spend it and seemed anxious to get back to his lab. fergus walsh, bbc news, 0xford. congratulations to him. the winner of the royal institute of british architects' most prestigious award, the riba stirling prize, will be

announced tomorrow night. there are six nominations for britain's best new building 2019, which include a railway station, an opera house and a scheme of council housing. since last monday, we have been taking a closer look at each of the nominated buildings. and today it's the turn of the cork house. it's constructed entirely from blocks of cork and timber that slot together without any mortar or glue of any kind. the whole project is carbon negative and has very low whole—life carbon. all the components can be reused or recycled, and it's been made entirely from by—products and waste from forestry and the cork stopper industry. this house is very unusual because it's made nearly entirely of cork blocks, placed one on top of the other by hand. there's no glue. what holds them together is an interlocking tongue and groove

profile and gravity. it's very interesting from a life—cycle point of view. as a biorenewable material, at the end of a building's life, if it's put together in a new way, it's completely biodegradable. six years ago matthew came to me with the idea of building a house out of cork. we identified it as being able to play all the roles that a building envelope needs to. so that's external walls and roof. it can potentially act structurally, to give enclosure, to give thermal insulation and weather tightness. it's always interesting as an architect when you design your own house the materials you choose and the way they are put together. you're actually designing the experience of that house. if you don't want to use any form work and you just want the cork to take the load itself, then the cork board structure is the natural result of that. each of the pyramids

is assigned its own function. so there's an outdoor entrance pyramid, cleaning and washing pyramid. there's a cooking and eating pyramid. a sitting and relaxing pyramid. and then a sleeping pyramid. that was one of the objectives, a very rich sensory experience. so that's why we combined the cork with metals, often a little bit of shimmer, so copper pipes in the roof or the brassworks in the bathroom and in the kitchen, just to give a little lift. even if i do say so myself, it surprised me how nice it is to be in here, actually. it has a really lovely acoustic and the smell and the quality of the atmosphere and the darkness in here as well as the light. it's very 21st century technology and it also has these references back to ancient forms of architecture at the same time. you can find out more about all of the nominated buildings on the bbc arts website and watch

this year's riba stirling prize live here on the bbc news channel tomorrow night from 8:30pm. i will have the papers in a moment. now it's time for the weather with nick miller. hello. we see two main types of autumn weather, low pressure with wind and rain or by high pressure with mist and fog. no prizes for guessing which of those two regimes rain at the moment. tight isobars, brisk winds, with abounds with hands of showers with some sunshine in between. exhibit b, thejet stream, which drives these weather systems oui’ which drives these weather systems our way, taking which drives these weather systems ourway, taking aim which drives these weather systems our way, taking aim at ours throughout this week. so the weather is very changeable but temperatures are fairly close to average, enough wind to prevent any forest or fog —— frost or fog overnight. wind to prevent any forest or fog —— frost orfog overnight. showers in the west will push further east in the west will push further east in the day, most frequent in western

scotland, hail, thunder possible. gusty winds as well, but the proportion of the day that is what is actually quite small, just a few showers moving through. they could get very wet, heavy downpours. temperatures were some spots but approaching 17—18. in northern scotla nd approaching 17—18. in northern scotland we will see the most frequent showers, but some of these disturbances moving further south at times, too. there will be showers all the way south and east across the uk. but it's not raining all the time, there will be some sunshine either side of these bands of showers moving through. wednesday may just feel a little showers moving through. wednesday mayjust feel a little cooler, especially in the wind. as we go from wednesday into thursday, still these showers keep on pushing into north—west scotland, it does look like a very wet week here. we may also see the disturbances move

further south across the uk, maybe a longer spell of downpours, theyjust start to pick up the winds as well so we start to pick up the winds as well so we just keep following our thursday aggressors. it may be a little different compared with this. temperatures again mostly the mid—teens. they know, temperatures are not changing very much the foreseeable. the pattern here does look different as we go into friday. for a start, there is a little bulge in the isobars, briefly pressure builds, but another area of low pressure takes over, that could bring another prolonged spell of heavy rain to the north—west of the uk. there is still something to play for in the position of this as we look to friday, with cows and places around that. a trailing weather fronts of the south, it looks like it's going to hang on into the weekend. this is how it shapes up into saturday. this weather front could well be slow—moving across parts of england in one. not looking at showers, but cloud and outbreaks of rain, but again some uncertainty about the position of this so far out, so