this is bbc news. the headlines at 3pm: british airways cancels all flights at heathrow and gatwick until at least 6pm this evening, after a global computer system failure. it's thought that thousands of passengers are affected at heathrow, a queue is now stretching outside terminal five due to the computer problems. currently as you can see behind me, there is a huge queue waiting for any information. my main concern now is that i don't want my 80—year—old grandma spending the night on the heathrow floor. the terror threat level in the uk, which was increased to the highest status of ‘critical‘ following the manchester bombing, has been reduced to ‘severe‘. there will be more arrests and searches, but this greater clarity and progress has led jtac, the independent body that assesses threat, to come to the conclusion that the threat is no longer imminent. police and army bomb disposal experts have been evacuating an area of moss side as part of an ongoing search linked to the manchester arena bombing. new revelations about

president trump's son in law, jared kushner, and his alleged involvement in secret dealings with russia. deep concern as one nhs trust considers reducing the number of children diagnosed with autism. also in the next hour: all to play for in the all—london fa cup final. a repeat of the 2015 win for the gunners would make arsene wenger the most successful manager in the tournament's history. but premier league winners, chelsea, are desperate for the double. and how 50 shades of spray can turn anybody into an artist, in virtual reality art galleries. that's all in click, in half an hour, here on bbc news. good afternoon and welcome to bbc news.

british airways says it has cancelled all flights from heathrow and gatwick before 6pm today because of a "major it system failure that is causing very severe disruption" to theirflight operations worldwide". ba says it's working to resolve the problem. passengers have reported "chaotic scenes" at heathrow airport — but the issue has affected ba flights around the world. andy moore is at heathrow. how much information is forthcoming directly from ba? it has been very slow, and a lot of those passengers in the terminal is not only here at heathrow but at gatwick and around the world have been complaining that there has been very little information from british airways. that may be because their own staff do not know what is happening, because the computers are down. it

may be that the public address systems have failed in some way. certainly a lot of passages are complaining they are not being updated about the situation. what we do know is that flights on heathrow and gatwick have been cancelled until at least 6pm. passengers have been told not to come to the airport here at heathrow or gatwick. if they are flying after that, then they are being asked to check with ba and check the internet as best they can. having said that, the ba website was down earlier on today. it seems to be back up and running at the moment. this is a majorfailure. one senior aviation source has told the bbc he has not heard of an it failure on this scale before. he believes it is right that ba should cancel those rights until at least 6pm in order to try and reset the system and get the flights working again. there is no sign at the moment that the it outage problem has been resolved yet. the interconnected nature of

international travel is that there will be knock—on effects far beyond these two airports. that's right. we know there are effects at airports around the world. we know of passengers who are stuck on planes, we have one bbc reporter stuck on a plane, he had an update from the captain recently saying they had no idea when they would be up and running again. he thought it would probably be sometime. one passenger ona probably be sometime. one passenger on a british airways flight. by the captain that the situation was catastrophic. another passenger was told that the system was down due to a cyber attack. that is what some ba staff have been telling their passengers. ba itself says at the moment there is no evidence of a cyber attack. having said that, they have not told their passengers all the media what has caused this global it problem. for the moment, thank you. earlier i spoke to dan power who was at heathrow terminal five, waiting for a flight to milan.

took us about three hours to get through check—in, now as you can see behind me there is a huge queue. waiting for any information. we have not been given any yet. the only information that we have had is courtesy of the bbc. we have heard nothing else, so i am in a queue waiting to see whether i am rebooking, cancelling, we have no idea. well i'm glad we have been of use to you, but i suppose you would really like to hearfrom ba. where are the staff? i haven't seen a single person since check—in. we haven't seen a manager yet. we have had no announcement on the tannoy. my flight is currently still scheduled on the board to leave at ten past one. that obviously is not going to happen. we have heard absolutely nothing, i have tweeted ba, e—mailed them. still nothing. what have you been offered in terms of refreshment? absolutely nothing.

travelling with my 80—year—old grandma for her birthday, it's a celebration weekend. we have had nothing. we have not been offered any chairs, any water, any vouchers. nothing. tell us then where would you, when would you, expect from what you have been hearing from other passengers, to actually take off? my current thinking, again just on the rumour mill and what you have been saying, is i don't think this holiday will happen, at this rate. my main concern now is that i don't want my eight—year—old want my eighty—year—old grandma spending the night on heathrow floor. that was a passenger waiting with a large group of family and friends to travel to milan from terminal five. let's look at the live pictures of heathrow. you can see nothing much

happening on the runway as you would expect. everything has been cancelled, all flights coming in and out of heathrow and gatwick suspended. until 6pm this evening. huge amounts of knock—on effect for passengers in other parts of the country and the world. extremely congested in both of those airports. the airline saying they found no evidence this is a cyber attack that has affected their it systems. travellers waiting on social media that they are unable to check—in or use the app, the airline ‘s app. some passengers being told that if they have not already booked an online before they arrived at the airport that they would not be able to do so, actually inside the terminal. more information hopefully will be forthcoming from ba in the next half hour or so. the prime minister has announced that the threat level facing the uk is being reduced from critical to ‘severe', following significant progress by police in their investigation into the manchester bombing.

it means that an attack is no longer regarded as "imminent", but remains "highly likely". soldiers who have been assisting police, will be withdrawn from the streets from midnight on monday. overnight police in manchester made two more arrests. they are now questioning 11 men over the attack by salman abedi at manchester arena on monday. from manchester our home affairs correspondent tom symonds reports. another morning in manchester, another area of the city evacuated. this is a terrorism investigation that is not yet over. this time it was moss side. police had been searching here for some time, and this morning roads were closed off again and the bomb—disposal team arrived. they're trying to work out where the bomb was made, where its components stored, and that means there is a constant risk. the investigation is now focusing on who abedi knew, resulting in more arrests. about three o'clock,

we heard a blast... a blast this morning as police in cheetham hill blew open this door in yet another raid. local people have helped us established the identities of the 20 and 22—year—old men arrested here last night, and we've already been able to establish a link between one of them and a member of salman abedi's family. that's the pattern of the police investigation — start with the bomber, find out who his friends and acquaintances are, and arrest them. police are increasingly confident. they've got a good understanding of salman abedi's network movements, they're more certain about the ongoing risk, so the prime minister was able to make this statement. jtac, the independent joint terrorism analysis centre, has this morning taken the decision to reduce the threat level from critical to severe. the public should be clear about what this means — a threat level of severe means an attack is highly likely. the country should remain vigiliant. and so, for this bank

holiday weekend at least, the high levels of police activity around the country will continue. tom symonds, bbc news, manchester. mark rowley is the met‘s assistant commissioner — and also the uk‘s most senior counter terrorism officer. he's been giving this update to reporters at scotland yard. the high pace and rapid progress of the investigation is continuing. there were three more arrests overnight, we now have 11 men in custody. there are now 17 searches either concluded or continuing on various addresses, largely in the north—west. and we get a greater understanding of the preparation of the bomb. there is still much more to do. there will be more arrests and searches but this greater clarity and progress has led jtac, the independent body that assesses threat, to come to the conclusion that the threat is no longer imminent. homes in the moss side area

have been evacuated — as police carry out a further raid. let's speak to our correspondent dan johnson. what have you been seeing? what other policing? things have calmed down here a lot and the last couple of hours. there were quite a few streets around this suburb south of manchester city centre that were cordoned off, and homes were evacuated this morning as the bomb squad came in to investigate what was in that house there, where you can see police officers and forensics teams at the door. that is the house they have been searching. you can see the window open upstairs, forensic teams and the bomb disposal unit all involved in searching that property, and for a time that meant a number of homes around it had to be cleared. that has produced in the last hour or so. it is just this one street that is

now closed, with people having to come and go through this police called in to get back to their homes. this is symptomatically the way this investigation has spread right across manchester with raids and searches popping up here and there. some of them surprise and local people and upsetting them, because these have been very intense raids carried out urgently, very quickly police using all the tools they have to break into these houses as quickly as possible to find any evidence that may be there. it looks like it is working. they are gaining more evidence, further leads. following that up and arrested more people. we're not sure if they have made arrests here, they have not confirmed that though local people have said they saw one man being taken away. we know there are 11 people in custody, ii taken away. we know there are 11 people in custody, 11 men being questioned by 13 people in total have been arrested since monday's attack. as the police build up a better picture of exactly what salman abedi's network was like and who else may have been involved with

him. the police increasingly confident they're getting on top of this but still work to do, still the possibility of more searches and arrests to come. our correspondent catriona renton is at st anne's square in manchester city centre. this is really becoming a focal point for people to come and remember what happened on monday. yes, if you look, you can see the absolute depth and scope of what is behind me here. there are flowers almost as far as you can see. balloons of course. that has stretched on growing, i have been here since early morning today and the number of flowers isjust increasing rapidly. people co nsta ntly increasing rapidly. people constantly coming to the square here to stop, pause, to remember. there are hundreds of people here, you can't move if you walk outside of the pen where we are here. that tells you something because it is so quiet. people are here being respectful, remembering the 22

people who lost their lives on monday evening, and let me give you an up—to—date set of figures for the injured. a people have been treated in hospital since monday. 63 still in eight sites across greater manchester. that is 63 people in hospitals in greater manchester. 20 people in critical care. those numbers forever changing as those who are better are able to leave hospital. of course, as so many still there being treated. i have spoken to many health workers who have come here this morning to pay tribute. that has given them some solace, some support they have been able to see. the amount of work they have put in and how people are responding. there are so many people giving each other support here today. we have a range of people, street pastors, emergency services, police. there is a high police presence. police remain invisible.

there are some big events of course in manchester this weekend. the great manchester run tomorrow. more than 30,000 runners are credited for that. there is the great city games on today and they pop concert on tonight. people are coming to the city from all over and so many coming into the square here, to pay tribute to those who lost their lives. as this city comes together and really looks after each other. thank you very much. it's cup final day in both scotland and england. celtic will win the domestic treble and finish the scottish season unbeaten if they beat aberdeen in the scottish cup final. and arsenal and chelsea will meet in the final of the fa cup—— in the final of the fa cup — chelsea are looking to complete the double. let's talk to our correspondent at wembley — olly foster. can you tell us about security tonight? we are just over two hours

away from kick—off. gates should be open fairly soon. 90,000 headed to wembley. the fa say there will be an enhanced security operation, asking fa ns to enhanced security operation, asking fans to arrive no later than one hour before that 5:30pm kick—off. the met police say there is going to bea the met police say there is going to be a highly visible and robust policing. 600 officers, we think. many armed. that is what fans will experience as they arrive here from all corners. obviously it is arsenal and chelsea said will not have to come very far. most of them, there will be a minutes silence before kick—off. the players will wear black armbands. the duke of cambridge in his capacity as the president of the fa is going to lay a commemoratives brief before kick—off as well. —— a commemoratives wreath. matthew upton is here. thanks forjoining us.

let's start with arsenal, arsene wenger the manager, there is a large section of fans who want this to be his last match in charge after 20 yea rs his last match in charge after 20 years at the club? a man who has transformed arsenal really in his 20 odd years. definitely. he has a legacy. it's clear for everyone to see. the way this is happening, the pressure, and how it's being reported, i find pressure, and how it's being reported, ifind it's pressure, and how it's being reported, i find it's very sad for arsene wenger because if he was to leave the club, it should be going out looking at the positive things he has brought here. he's been very strong in his interview to the bbc released today ahead of this match. calling an absolute disgrace, the criticism he has faced over the last three months. i can understand that but you can look at the other side of it. there has been uncertainty created by the club this season, and maybe by him, maybe by the board, but there has been mixed messages coming out of uncertainty, which players and supporters are never going to relate too well. they need to be very clear, in my opinion,

about what direction the club is going in. an important board meeting next week when we might find out his future. do you think the result of this match means he stays or goes? i mean if they are walloped by chelsea, that is going to affect how that board thing next week. potentially, but to be honest, this result of a one—off game, i can't see how you can gauge anything of that. you have to look at arsenal over the past three or four seasons. definitely over the whole of this season to make any assessment of where the club as that. i think it's a great opportunity for arsene wenger to get what would be a fantastic victory for him here today. personally that were taken to seven fa cups, which would be a record. 13 for the gunners, that would be a record. it would move them ahead of man united. again. but what a season for antonio conte, his first in england, like a juggernaut, they stormed to the title. arsenal probably to blame for that. they beat them 3—0 back in september and

co nte beat them 3—0 back in september and conte changed his system as a result and has never looked back. it's almost like they stirred up a hornets nest, and all of a sudden conte from the answers and put a formation of players together that have been so united this season. he has really found that formation, slotted players in, some out of nowhere to some degree. people like moses and alonso who have come in and done great jobs moses and alonso who have come in and done greatjobs as moses and alonso who have come in and done great jobs as wingbacks. they have been able to play the same starting 11 every week with no european commitments they can focus on the premier league. that has really shown this season. arsenal have their defensive problems on top of everything else. the smart money has to go on chelsea?” of everything else. the smart money has to go on chelsea? i would love to say different but i think you're right. the smart money will go on chelsea, just looking at how strong they are and also with arsenal's defensive absentees today. i think it would have been a tough ask for them with a full squad available but with the players they are missing it's going to be a real challenge. with the players they are missing it's going to be a real challengelj it's going to be a real challenge.” know if we stay on air for another second a sprinkler is going to go on and it will be one of those things

that are seen for evermore across television. it's a half past five kick—off here at wembley, arsenal against chelsea. across the bbc of course. i'm so tempted to keep you there for a few more minutes! but we won't. please don't. it would spoil the suits and their hair. the headlines on bbc news: british airways cancels all flights at heathrow and gatwick until at least 6pm this evening, after a global computer system failure. the terror threat level in the uk, that was increased to the highest status of ‘critical‘ following the manchester bombing, has been reduced to ‘severe'. the prime minister said the country should remain vigilant. police and army bomb disposal experts have been evacuating an area of moss side as part of an ongoing search linked to the manchester arena bombing. an elderly couple who were stabbed to death at their home in county armagh have been named. a relative found the bodies of michael and marjorie cawdery,

who were both 83, in portadown yesterday. a ao—year—old man has been arrested and is still being questioned. president trump has said he'll make a final decision whether to maintain the us‘s support for the paris accord on combating climate change next week. he's among the leaders of the seven top industrial nations meeting at the g7 summit in italy for the final day of talks. let's cross live to taormina in sicily, where the bbc‘s james reynolds is following the summit. did not end well then? it's over, and a lot of the leaders did not like it. essentially the g—7 has revealed a new fault line, and internalfault revealed a new fault line, and internal fault line. there revealed a new fault line, and internalfault line. there is now an informal g six against an informal gi, informal g six against an informal g1, of the us on one important issue. climate change. the informal g six which includes great britain

says it remains committed to the paris climate change accord of 2015 which limits carbon emissions. president trump has said he continues to review that agreement and he will give his final decision next week. there is that fault line and the leaders in that informal g six can barely disguise their disappointment. angela merkel has said she is very dissatisfied with how things have gone. italy's prime minister, the host of the summit, has said he was disappointed. there we re has said he was disappointed. there were frank and lively discussions. france's emmanuel macron, the newest member of this g—7, said he spoke to mrtrump about member of this g—7, said he spoke to mr trump about the us remaining within the agreement and said mr trump did listen and pay attention. but the final decision will be left for a week. it is, for those six leaders, a disappointing end. climate change for them is a very important issue. the us suggests it may leave the climate change agreement, others may be tempted to be the same. the us secretary general has told us it is not the end of the world if the us leaves, but very clearly it will be a severe

blow to the deal if that were to happen. thank you. let's ta ke let's take a look at the situation in gatwick. one of the airports along with heathrow affected by this global it systems failure that bt are reporting, as a consequence they have cancelled all flights from and into heathrow and gatwick before 6pm this evening. you can imagine how much congestion that has caused. not just a heathrow and gatwick but also in other airports in this country and beyond. of course it is interconnected. company saying, we have experienced a major it system failure that is causing a very severe disruption to flight operations worldwide. they are saying not aware of a cyber attack though, at the moment. passengers we have spoken to have been waiting at the airport, saying there is not

much information from ba and they would very much like to know more about the plans from 6pm onwards. some people have been waiting since this morning to catch their flights. very little detail coming to them. it seems, from british airway. they are scrambling to get things put back to normal. we will keep an eye on it. and bring you more throughout the afternoon. president trump's son—in—law and senior advisorjared kushner discussed opening a secret communications channel with the kremlin, according to media reports. the fbi is investigating mr kushner as part of a wider probe of alleged russian interference in the us election campaign, as our correspondent david willis reports. proposals to try to reduce the number of children diagnosed with autism are being considered by the nhs in south—west london. the local clinical commissioning groups say nothing has been decided yet, but the national autistic society has written to them to say it's "deeply concerned" about the plans. our health correspondent jane dreaper reports. children with autism

struggle to interact with the world around them. they are often diagnosed between the ages of six and nine. services in south—west london are very stretched, and the nhs there is considering a controversial idea. a team that is supposed to carry out 750 annual assessments is actually getting 1300 referrals a year. so nhs commissioners in five local council areas want to reduce the number of children diagnosed with autism, by focusing specifically on the most severe cases, where children have another illness such as depression. a leading autism charity is deeply concerned. we think it is short—sighted and can cause lots more problems and be more costly in the long run, and will have a massive impact on those families who just want to find out what they can do to help their children and what support needs to be put in place. the charity has written to the nhs in south—west london, urging them to withdraw the proposal.

the commissioning groups say nothing has been decided yet. and they will talk to local people before deciding the way forward. now let's visit a pizza shop in philadelphia where customers can pay $1 to donate pizza slices to the homeless. mason wartman, the shop's owner, says he feeds on average around 100 homeless people a day. music. my name is mason wartman, i am the owner of rose's fresh peaks. the owner of rose's fresh pizza. we sell each slice for $1, but we have a cool programme in effect right now where you can purchase a slice for a person in need and they can come

in and enjoy free pizza. there is a tradition in italy where you can purchase cups of coffee for people, in an empty shelf behind the register. so, we use post—it notes. music. my name is kathleen davies. i am originally from chester. i had a rough experience and i lost everything, so i am going through a crisis right now. so i come in and i get two nice slices of pizza. and i tore that pizza up because i was hungry, and i was like, wow. now, this is cool. it energises me, it makes me want to do something.

even though i'm homeless, it doesn't mean i can't do something to help somebody else. it really is something that is scalable to a number of areas of life in general, and i encourage people to emulate what we have done here in their communities. itjust goes to show how temporary the condition of homelessness can be, and how with just a little bit of kindness, someone can really make... they can just really turn their they can just really turn their lives around. we like that idea. hope you do. let's get the weather now.

0h oh no. that tells me everything. it really does. there is some sunshine and some storms. gusty winds reported, and these clusters of thunderstorms will continue to move north. we will see a bit of rain across western scotland, cloud as well. further south is quite a quiet night. a bit fresher than it has been but still fairly mild. into sunday, the northern half of the country holding onto some cloud and spots of rain across scotland. central and southern areas will see sunshine, temperatures will rise but we will see showers and storm is coming up from the south. a bit fresher across the north and west. a cool day from northern scotland. bank holiday monday quite messy, some outbreaks of rain, some heavy and thundery, becoming combined to

northern and eastern areas. quite muqqy northern and eastern areas. quite muggy in the south—east, cool and fresh for the north and west. you are watching bbc news. your headlines atjust after 3:30pm. british airways cancels all flights at heathrow and gatwick until at least 6 o'clock this evening, after a global computer system failure. ba says it's working to resolve the problem. passengers have reported "chaotic scenes". as you can see behind me, a huge queue waiting for any information. my queue waiting for any information. my main concern is that i don't want to spend the night on heathrow floor. the terror threat level in the uk which was increased to the highest status of ‘critical‘ following the manchester bombing has been reduced to ‘severe'.