this is bbc news. the headlines at 11: almost 200 military personnel are deployed in salisbury — as the grave of sergei skripal‘s son is the latest place to be sealed off by the authorities. an 85—year—old man dies in a hospital waiting room in northampton — nhs bosses blame ‘dangerous overcrowding.‘ after months of trading insults, president trump and the north korean leader kim jong—un agree to meet face to face. the old bailey sees the contents of the bomb that partially exploded in a tube carriage in london last september. and on newsnight, we hear more from parliamentary staff after downing street says it is concerned about voiding allegations against mps, and former kremlin adviser tells us how russia feels about being accused of poisoning sergei skripal. good evening and

welcome to bbc news. these are the scenes that greeted the people of salisbury today as just under 200 military personnel arrived in the city and onto the streets. specialist troops, with training in chemical warfare, will be working in the area where the former russian agent sergei skripal and his daughter yulia collapsed on sunday. forensic examinations are also taking place at the cemetery at the gravestone of skripal‘s son, alexander, who reportedly died of liver problems at the age of a3. the home secretary will chair another meeting of the government's emergency cobra committee tomorrow. our home affairs correspondent tom symonds reports from salisbury. it began with unprotected police officers dealing with an unexplained medical emergency. this evening, the military was called in at salisbury hospital. troops, trained to tackle

chemical warfare, supporting a british police investigation. their mission includes securing possibly contaminated evidence — painstaking work. the stakes are high. as the ministry of defence we have been supporting the police in their investigations through the work of military scientists at porton down. we will continue to do that. another task — dealing with contaminated vehicles. this police car may have been driven to the hospital after the incident. 180 troops will be involved in this phase of the investigation. they have all the chemical agent monitors, the personal protective equipment, respirators etc that allow them to safely, and they will probably take this kit to porton down or perhaps winterbourne gunner, where it can be decontaminated effectively. they're also expected to secure sergei skripal‘s car and there are ambulances which may have traces of the nerve agent. across the city, scenes that might have come from a disaster movie.

this isjust a graveyard, but it contains the graves of sergei skripal‘s wife and his son alexander. he died last year. again, no official explanation for all this. the dates on alexander's grave may be relevant. last week, before the nerve agent attack, was the anniversary of his birth. did his father and sister visit the grave at some point? the home secretary was the first senior government representative to come to salisbury this morning. ministers have stressed the importance of getting to the bottom of the alleged plot before pointing fingers. she met and praised those who've helped the victims and decontaminated the area, including these firefighters. i am in awe of their sympathetic approach and professionalism as they engage with these people. and now as they reflect, they are quite concerned sometimes for themselves and their families, but they've all said to me that they wouldn't have done anything differently.

then to the hospital, continuing to provide the highest level of care to three victims. detective sergeant nick bailey, exposed to nerve agent during the incident, is now making good progress. he's an officer who has been widely praised. always really easy to speak to, and he delivers effectively and efficiently, and he's always got this sense of humour around him, so he does it easily and nothing is ever too much trouble for him. sergei skripal remains in a critical condition. his daughter yulia the same, but she is responding better to treatment. salisbury has become a multi—location crime scene, a city of disturbing images and unanswered questions. who wanted to kill them? why? how did they do it? what will happen next? tonight, the evidence is being gathered. a leaked internal email from the medical director

of northampton general hospital claims an elderly man waiting to be seen in a&e died ‘due entirely to dangerous overcrowding in the department.‘ our correspondent james waterhouse is here with more details — what happened ? we have heard a lot about the pressures on ame department and the nhs, this sounds like a tragic example of something going wrong. nhs, this sounds like a tragic example of something going wrongm was four o‘clock on wednesday afternoon that a 85 thereof and went to northampton general hospital, he was seen around 90 minutes later and told he would have to stick around ti; .. eseei e see other heart problem. from there he..- . , .-.. , ., in the heart problem. from there he..- . , .-.. , ., gtheg heart problem. from there he..- . , .-.. , ., 51 the 12:55??er heart problem. from there he..- . , .-.. , ., g the 3.er seven remained in the chair for seven hours until; cardiac hours until he suffered cardiac arrest at 1am on and this leaked e—mail that you mentioned from the medical director of the trust no less, matthew metcalfe, read "last night a patient died due entirely to the dangerous overcrowding of the

department. the risk we have all been aware of that may have helped —— felt hypothetical has just happened." and has there been an apology to the family? the trust has apologised to the man‘s family and they have given a statement. they say "ideally this man would not have been waiting so long, we don‘t know what differences would have made to the final outcome." the hospital‘s a&e unit has seen roughly 400 patients a day, roughly 30% increase on the year before. and the trust says that this would have inevitably impacted the service they provide. thank you very much. president trump has agreed to meet the north korean leader kimjong—un in a surprise move after months of tension and name calling. but the white house added tonight that no meeting could take place until north korea takes concrete action. south korea claims that kim jong—un is committed to denuclearisation and an end to nuclear and missile tests. 0ur north america correspondent nick bryant reports. like the kid who couldn‘t

keep the secret, donald trump slipped into the white house press room on a big subject. here we go, here we go. sure enough, a delegation from south korea soon stepped before the microphones to make one of the mostjaw dropping diplomatic announcements in decades. after delivering to the president a personal message from kim jong—un. he expressed his eagerness to meet president trump as soon as possible. president trump appreciated the briefing and said he would meet kim jong—un by may to achieve permanent denuclearisation. prior to arriving in washington, they had held a meeting in pyongyang with kimjong—un offering a warm hand of friendship rather than rattling his usual sabre. 0n state tv the schmaltzy soundtrack doubled as diplomatic

mood music, because the north korean leader offered to abandon his nuclear arsenal in return for security guarantees in the united states. then came a sentimental farewell. kim jong—un sent them off notjust with a wave, but an invitation to mr trump — the most improbable of overtures. donald trump agreed to the invitation insta ntly, a ppa re ntly without pre—conditions, without even consulting aides. perhaps that explains the confusion at the white house before the summit can take place. the president will not have the meeting without seeing concrete steps and ~ wrist f ~ so the president would_actuall¥ frankly, the world would be getting something. north korea‘s np'clearand miss—hg the toughest foreign policy dilemma for successive administrations. us presidents have always turned down offers

of face—to—face meetings. 0nly yesterday america‘s top diplomat in terms of direct talks with the united states and us negotiations, we‘re a long way from negotiations. what the white house is certain is about that the president‘s tough talk has exerted maximum pressure on pyongyang. they will be met with fire and fury like the world has never seen. "rocket man" is on a suicide mission for himself and for his regime. this is a huge gamble which offers pyongyang a propaganda coup without much ground work and without a guarantee of success. but all of donald trump‘s presidential predecessors

the governor of florida has signed into law gun—control legislation in the wake of the school shooting at parkland, in which 17 students were killed. it does not include a ban on semiautomatic assault rifles, the type that was used in the trustee last month, at the bipartisan bill does raise the legal age for buying rifles will stop the republican governor rick scott says it was a coppermine between the concerns of gun—control supporters and gun rights act buckets. -- advocates. after reviewing the entire bill i had to ask myself. would this bill making huge investment and radically improve school safety? and hopes of never seeing the tragic like this ain? never seeing the tragic like this again? would this bill provide more funding to treat the mentally ill, would this bill gives far more tools

to keep guns away from people who should not have them? the answer to all three is yes. and that is why i am signing the legislation today. let‘s take a brief look at some of the day‘s other news stories. the first aid convoy since monday has crossed into the besieged syrian rebel—held enclave of eastern ghouta. the red cross sent 13 trucks loaded with food but says it‘s not nearly enough to feed the thousands of civilians there. they were also prevented from taking in medical supplies. britain is close to agreeing a multibillion—pound deal to supply saudi arabia with 48 typhoon fighterjets. the announcement was made on the last day of a visit by the new saudi leader, crown prince mohammed bin salman. the trip has attracted criticism because of the saudi‘s role in the humanitarian crisis in yemen. the eu has said it may challenge donald trump‘s decision to impose tariffs on steel and aluminium. it claims they are in breach of world trade organization rules. the british government said

that, as a close ally of the united states, it would seek exemption from the tariffs. the man accused of carrying out the london tube bombing at parsons green made no attempt to deny he was responsible when he was arrested the day after the attack, a court heard today. the prosecution claims ahmed hassan — who denies attempted murder — told a detective that he made the bomb. thirty people were injured in september last year when the bomb partially exploded in a tube carriage. june kelly was in court. ahmed hassan on his way to brighten, hours after leaving a bomb on an underground train in london. two yea rs underground train in london. two years on from his arrival in the uk, the teenage asylum seeker had caused mayhem in its capital city. ahmed hassan later headed the dover, where he made the port area. thejury hassan later headed the dover, where he made the port area. the jury at his trial has seen their cctv footage of his movements. 0n the

run, he hung around this area until the following morning. and it was here, 24 hours after the tube attack, that police identified him asa attack, that police identified him as a wanted man. in an initial interview with counterterrorism detectives from scotland yard, hassan was asked, who made the device, and he replied "i did." in response to further questions he said that there might be a few grams of the explosive at his home address. hassan‘s device created a fireball when it partially exploded on an underground train at parsons green station in west london. the jury green station in west london. the jury was told today that the bomb was packed with shrapnel including nuts, bolts, screws, drill bits and knives. and it contained 400 g of the explosive tatp. it would have been lethal if it had fully decimated. this is the evidence from an explosives expert who went on to the train. the prosecution evidence

at this trial is now bring to a close, and hassan‘s defence case is due to start next week. sirjohn sourced, who won the nobel prize for medicine for his work on the human gene and project has died. his work in decoding the sequence of human dna, the building blocks of life, saw him awarded the prize in 2002. the headlines on bbc news. nearly 200 military personnel are deployed to salisbury as the grave of sergei skripal‘s son was sealed off by authorities. president trump and kim jong off by authorities. president trump and kimjong in degree to meet face—to—face it is due to take place by may. an 85—year—old man dies in a hospital waiting room in northampton, nhs bosses blame dangerous overcrowding. that‘s a

summary of the news, now it is time to newsnight. yesterday this programme revealed a culture of abuse and bullying that has gone largely unchallenged in the house of commons. tonight, we hearfrom more westminster staff who fear that the muted response to our revelations shows that nothing will change. that they will continue to be ignored. they are known bullies walking around the place and the house seems to think they‘ve sorted everything out. walking around the place, the house seems to think they‘ve sorted everything out now. so what — do we just wait until they do it again and report them ad infinitum? the investigation intensifies into the poisoning of sergei and yulia skripal. if the finger points at moscow, what action can the british government take, and would russia even care? we ask a former russian mp and kremlin adviser. we understand that you don‘t like vladimir putin as president of russia, because he is making russia great