this is bbc news. i'm julian worricker. the headlines at 11:00 — a breakthrough in brexit talks as britain and the eu agree to the terms of a 21—month transition period. but the eu's chief negotiator warns there's still work to be done. police say the investigation into the salisbury nerve agent attack could take months as forensic teams examine another car in a nearby town. uber suspends its self—driving car programme after a woman is hit and killed by one of their cars in the us. and on newsnight, a broadcast exclusive with the ceo of cambridge analytica. alexander nix responds to the charge his company is a full service propaganda machine. good evening and welcome to bbc news.

britain and the european union have reached broad agreement on a transition period after brexit. but there are still important issues to be resolved. in today's documents, highlighted in green is what's been agreed, in yellow, what's close to agreement, and in white, the parts still being negotiated. agreed so far is that eu citizens arriving in the uk before december 2020 will have the same rights as those here now, 3.1“ ”fe?! ‘3???’ ?*?%firf'£i¥"§fi?“§é§" r; ggiéaifi—icji £55,533; through contingency plans based

on guesses about the future deal. instead, they now have certainty about the terms that will apply immediately after our withdrawal. certainty? not quite. an oft repeated phrase in these brexit negotiations is... nothing is agreed until everything is agreed. the transition deal is part and parcel of the uk's complex wider withdrawal agreement from the eu as these slides show. areas highlighted in green indicate

where hard—fought agreement has been reached. but some of the most controversial issues remain unresolved. so, when it comes to the transition deal, what exactly has been agreed? it will be time limited, lasting 21 months after brexit day. during that time, the uk will continue to pay into the eu budget, and will keep full access to the european single market and customs union. the uk will have to follow all eu regulations, and though it may voice concerns, it will no longer be at the decision—making table. the uk will be allowed to sign new trade deals, but can't implement them until the transition period is over. what has not yet been agreed is what happens in ireland after brexit, how to avoid a hard border between northern ireland and the irish republic. this issue could bring the whole brexit deal, including transition, tumbling down. the uk hopes an ambitious eu and uk

trade deal will solve the problem. bu; 9.453? ig5§5274£5£%3¢5;é 7,7 ~ in the customs union and parts of the single market. ireland's deputy prime minister was in brussels today to press his case. what ireland has always asked for was that we would essentially have an insurance mechanism, so that i and others can say to people in northern ireland and in ireland, that, "look, we are not to have any border infrastructure on this island again." so, a lot done, but more to do for the eu's brexit chief. good news today? as you see, spring has sprung with the thaw spreading even to these often frosty brexit negotiations. progress on transition today was hailed in there as a big step forward, but it's not all good news for the government.

it's clear now, there won't be a final trade deal between the eu and the uk at the end of these brexit talks. the transition will be used to hammer out more details. and to get this far, the uk has had to make some pretty big concessions. like fishing. far from taking back control after brexit as promised by the government, eu quotas will continue during the transition period, allowing eu countries to fish in uk waters. this concludes our press conference. but it's not all over yet. eu leaders still need to sign off on the transition deal. they're expected to do that at a summit here later this week. katya adler, bbc news, brussels. international chemical weapons experts have arrived in salisbury to examine the nerve agent used to poison the former russian spy, sergei skripal, and his daughter. it comes as eu foreign ministers meeting in brussels have expressed unqualified solidarity with britain, a move strongly criticised by the russian foreign ministry tonight. here, the met police has

said it is highly likely the investigation could take many months. here's our diplomatic correspondent james landale. the focus today shifted to the village of durrington, ten miles north of salisbury, where investigators removed a car that was used to pick up yulia skripal from the airport the day before she and her father sergei were attacked with nerve agent. nearby, at the military research complex at porton down, inspectors from the global chemical weapons watchdog, the opcw, were due to start analysing the nerve agent that british experts believe came from russia. in brussels, the foreign secretary and to brief eu counterparts, saying russian denials were increasingly absurd. this is a classic russian strategy of trying to conceal the needle of truth in a haystack of lies and obfuscation. there is scarcely a country round the table here in brussels

that has not been affected in recent years by some kind of malign or disruptive russian behaviour. eu foreign ministers issued a statement expressing their unqualified solidarity with the uk, and taking its assessment that russia was to blame extremely seriously. the eu and nato speaking as one. what is absolutely clear is our full solidarity with the united kingdom, and oui’ extreme concern about what has happened. it is really unacceptable. all 29 nato allies stand united. we stand in solidarity with the united kingdom. and the uk is not alone. as an anti—russian reflex. as for russia's diplomats in london, well, some of these officials and their families will be heading home tomorrow, 23 in all.

with a similar number of british diplomats leaving moscow shortly. tomorrow, the national security council will meet to decide britain's next step. there is a live debate within government — should they retaliate and escalate, or simply do nothing? should they kick yet more russian diplomats out of the embassy here, or should they find new ways of penalising russia ? the risk for britain is that a bilateral confrontation with russia might overshadow attempts to maintain international pressure. back in salisbury, the police tonight revealed the full scale of the investigation, with 250 counter—terrorism officers examining 4,000 hours of cctv, 800 exhibits and 400 witness statements. detectives said this could last many months. james landale, bbc news. uber, the minicab service, has suspended all tests of self—driving cars after a woman in arizona was killed in a collision.

at the time of the accident, the vehicle was running in autonomous mode with an operator at the wheel. uber described what happened as incredibly sad and said it was fully cooperating with local authorities. our technology correspondent dave lee reports from san francisco. it was late sunday night when, according to police, elaine herzberg was struck by uber‘s self—driving car. the 49—year—old was crossing the road, but not using the pedestrian zone. there was a driver behind the wheel, but uber said the vehicle was in full autonomous mode, meaning it was handling all aspects of the driving. miss herzberg was taken to hospital, but died from her injuries. taking to twitter, uber‘s chief executive, dara khosrowshahi, said the news from arizona was "incredibly sad". adding: as part of its licensing agreement, uber must keep detailed logs in case of an incident like this. although miss herzberg

is the first pedestrian to be killed by an autonomous vehicle, her death comes one year after uber temporarily took its self—driving cars off the road following an accident that left a volvo suv on its side in arizona. the programme was later reinstated. there are so many motor vehicle deaths in the united states, and generally, every year. and the ultimate goal of self—driving cars is to eliminate those entirely. but these are complex systems that are just sort of starting to navigate the roads. arizona has positioned itself as a testing ground for this new technology. but incidents like this will no doubt concerned those who do not believe these systems are yet safe enough to be on our roads. the uk's information commissioner, elizabeth denham, says she will seek a warrant to look at the databases and servers used by the data mining company cambridge analytica. a former employee at the firm claims they were handed the personal data of 50 million facebook users which was then used to influence the 2016 us presidential election.

facebook‘s shares finished nearly 7% down after a turbulent day on the new york stock exchange. both cambridge analytica and facebook deny any wrongdoing. in the past hour, the new york times is denying alex cailotto leave the company following internal disagreements. earlier, i spoke to our technology correspondent zoe kleinman for the background to the story. the story has just been running all day. what we have now heard is that cambridge analytic is under huge scrutiny about its practices in the past. there has been an explosive report suggesting that it was prepared to discredit politicians online using everything from fake news to orchestrating setups to make somebody look like they are in a compromising position. the firm completely denies all these accusations, said that have a

mistress resented and it has campaigned against the media against it. the fact is it got hold of an awful lot of data in a non— transparent way and then used that later to try and influence the presidential election in 2016. facebook have been drawn into this as well to a degree. the reason facebook is involved is because somebody developed an application which you can use on facebook, like a which you can use on facebook, like 9, which you can use on facebook, like a game, where you can find out what kind of personality you had lots of people took part in this, great fun. what they didn't realise is every person was giving all their data and their friends data to the creator of their friends data to the creator of the app. the creator of this outsold the app. the creator of this outsold the data it is claimed on to cambridge analytic. the fact is that wasn't transparent. you didn't know your data and all of your friends was being sold to a marketing firm and then it is alleged used to support donald trump in his election campaign. now we have this

information. that will be used tomorrow. and facebook is also said it had hired an independent audit tea m it had hired an independent audit team to conduct an audit on its behalf to find out exactly what cambridge analytica has because it is not clear whether this data was ever deleted properly. the itv presenter ant mcpartlin says he will seek further treatment after he was arrested on suspicion of drink driving. he was detained yesterday afternoon following a collision involving three cars in south—west london. itv says his saturday night programme with partner, declan donnelly, will not be broadcast this weekend as our entertainment correspondent lizo mzimba reports. moments after the mini he was driving was involved in a collision with two other cars, ant mcpartlin at the scene of the crash. when police arrived, he was taken away under arrest after failing a breath test. a number of people were treated for minor injuries, and a child passenger in one car taken to hospital for a precautionary check—up.

i think it's time for me to say hello to our lovely audience! the evening before, ant mcpartlin had been presenting itv‘s saturday night takeaway. he had gone to rehab to treat an addiction to alcohol and painkillers. ant, together with dec, has become one of tv‘s most successful presenters. the pair have won dozens of awards and earned millions, thanks to their popularity with viewers. itv said they hoped the presenter would get the help he needs. the police say enquiries into the collision are continuing. now, it's time for newsnight. tonight, a broadcast exclusive

with the ceo of cambridge analytica. alexander nix responds to the allegations of dirty tricks at his company and vast breaches of data security. we see this as a coordinated attack by the media that's been going on for very, very many months, in order to damage the company that had some involvement with the election of donald trump. we put to him the accusations of a whistleblower that he runs a full scale propaganda service. we get our biggest glimpse yet of the brexit deal. is it to be a full english or a dog's dinner? now today was about the steps we will take next year when we leave the eu, but before we fully relinquish our legal