this is bbc news. the headlines at eight: the boss of british airways says a power supply issue was behind a power supply issue was behind a power supply issue that left thousands of passengers stranded worldwide. we are currently in a huge queue waiting for any affirmation. my main concern now is i do not want my 80—year—old grandmother 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. a threat level of severe means an attack is highly likely. the country should remain vigilant. army bomb disposal experts evacuate homes in moss side as part of an ongoing search linked to the manchester arena bombing. families of the victims of monday's attack visit st anne's square to pay their respects to loved ones. also, arsenal win the fa cup final

against chelsea. manager arsene wenger wends his seventh fa cup with a 2—1victory. i'm in hull where thousands of people turned out for the first day of radio one's big weekend, amid tightening security. british airways passengers around the world are facing flight cancellations and delays — after a globalfailure of the company's computer systems.

planes have been grounded at many airports worldwide. all ba flights from london heathrow and gatwick have been cancelled for the rest of today. the airline says delays and disruption may continue into tomorrow. it has also apologised and said it's "working to resolve the problem," although it had found "no evidence that it's a cyberattack". the british airways ceo has said a power supply issue was to blame. the gmb union said the meltdown could have been avoided if the company hadn't outsourced hundreds of itjobs to india. a ba spokesperson has refuted the claim and has said that they "would never compromise the integrity and security of their it systems." our business correspondent, joe lynam, has more. this is what happens when there is a major it failure. queues were snaking out of the door at terminal

5 at heathrow airport for thousands of ba passengers. the long bank holiday didn't start very well for these people. people have been standing in the queues for up to 120 minutes in some cases. the queue stretches from the check—in desks all the way out to the back of the terminal and down in front of the terminal where all the taxis deliver people. we have just literallyjust been told nothing is happening and no flights until 6pm. prior to that we had not been told much at all, there we re had not been told much at all, there were no tannoy announcements whatsoever. travelling with my 80—year—old grandma for her birthday, it's a celebration weekend, 13 of us going and we have heard nothing, haven't been offered any chairs, water, vouchers, nothing. by this afternoon, the disruption was such that ba took the unusual step of cancelling all flights after 6 from heathrow and gatwick airports. this is the queue for customers

leaving the terminal. and there have been reports of severe delays for ba flights around the world. this isjfk in new york. and this is rome. ba said it had experienced an it outage which had affected the airline's global network. it said it was working to resolve the problem and apologised to customers. a senior figure in the aviation industry said an it failure of this magnitude was extraordinary and rarely seen. he added ba had taken the right step to stop all departures. for some ba passengers though, the long bank holiday weekend could be very long indeed. joe lynam, bbc news. our correspondent simon jones is at heathrow. we have heard the stories of chaos

and confusion, we sought the pictures in that report, how are things where you are? not a pretty picture, what passengers who were hoping to fly with british airways today have been told to go home and the message is if you have a flightless evening do not even attempt to come to the airport because they will not be a flight. airport because they will not be a flight. passengers have complained a lot during the day about the lack of information. they got to the airport to find the flight not going, then they had trouble getting any sense of what might happen next. ba said in the afternoon zero flights before 6pm and then later no at all during this evening. what people now want is clarity and they feel they are not getting that. what we have had is the boss posting a statement on twitter in which she has apologised

for the disruption, particularly to families hoping to jet off ahead of the half term holiday. he says they are working tirelessly to fix this problem but what he could not give is any indication of when the system might be up and running again. ba told us at the port overnight long haulflight will told us at the port overnight long haul flight will be able to take off with a view to landing back here tomorrow and they are hoping the system will be up and running again by tomorrow but they are warning, evenif by tomorrow but they are warning, even if that happens, there will be delay and disruption for tomorrow at least. some experts have said it might takea least. some experts have said it might take a number of days to get the system back up and running because you have a lot of passengers unable to travel so a huge backlog, planes in the wrong places, got to get all this back in order and that is not going to be an easy task. what we do not have tonight is clarity over when we will see an end to the situation but ba telling us

in that statement they feel this was caused by power supply problems and no evidence it was any sort of cyber hacking. simon, thank you. with me is andrew teacher, former spokesperson for heathrow airport and now the director of blackstock consulting which advises companies on planning and infrastructure. what did you think, and who, when you saw the story? it is evident's worst nightmare, whether you are a family of the boss of british airways hoping for a quiet weekend, this is not going to be what anybody wa nted this is not going to be what anybody wanted to happen. in these situations, there is very little you can do. clearly if you do not have a computer system working. what should ba haven't done? their first carer is their customers. and they are not even talking. what would you have advised them? what

they sought to do, and i am not employed by british airways and did not speak on their behalf, but they have been honest with people, obviously you noted in your report they have not been able to give a clear definition and timeline of when the problem will be fixed that is because they do not know. when these sorts of things occur, and it is not the first time, it happened to delta air and the in the past, high street banks across britain affected by it issues, ba is not the only big brand to be affected in this way. what matters is that relationship with the customer is so so close and the appear in the early hours to have gone to ground. what they have done since the ceo of ba has been on twitter giving a statement, they have been advising people not to go to the airport. the issue you have

in these situations is people do not a lwa ys in these situations is people do not always listen to advice. let's be honest, companies will always he criticised whatever happens and in this situation there is no right answer. very quickly, i have a look at that alex cruise's statement on twitter and a lot of people are saying a lot of people do not want to watch twitter, they want to see it on the screen. we would have expected to have someone speak directly to the media and a lot of the stranded customers are getting updates and finding out what is happening from news channels like the bbc. putting a video on twitter is not the best advice. i think the reality is a lot of people will be communicating in that way and the challenge in this situation is when a massive computer system has gone down it will take 12 hours or so to reset and everything

to come back online and bit by bit and bits of the system are now back, as we have seen, and people are able to break things again. but the challenge will have a safety and what would be worse than people being delayed is the safety being at risk and we must keep things in context in that way. andrew, thank you for your time. the threat level to the uk is being scaled back from "critical" to "severe" following intense police activity relating to the manchester bomb attack. officers have been targeting the network they believe supported the suicide bomber, salman abedi. our correspondent dan johnson has sent this update from manchester. while detectives and forensic investigators have spent most of the day at this terraced property in moss side to the south of manchester. we can assure you cctv of the moment they arrived just before 7am. a team of police

officers bashed the door in and went in to search what was inside that house. they brought out is to men who were taken away in handcuffs and put ina who were taken away in handcuffs and put in a police van, presumably taken away for questioning but we have not had confirmation they actually made arrests here at this address this morning. but what happens —— look what happened and hour later, we see an army bomb disposal unit arriving because the police officers clearly found something that caused them concern and that caused a number of streets to be sealed off around this terrace and a number of homes evacuated and people were pulled to leave their properties and get back for their own safety. there was quite a large police cordoned put in place while the bomb disposal team worked in making sure everything he was safe. there has been other investigations going on across manchester today, two more arrests this morning to the

north of manchester which means they are now 11 men in police custody being questioned. we got an update also won the number of casualties. there are 63 people who are still injured and being treated and 20 are receiving critical care which means they have got serious injuries. still the impact of monday's attack is being felt and taking time for people to fully understand and the police investigation is rippling out even further across manchester and beyond as detectives build a bigger picture of the network that must‘ve been involved in building this bomb and detonating that devastating attack on manchester arena on monday night. the change in the threat level comes on one of the busiest days of the year, with many events being held across the country over the bank holiday weekend.

extra police and security staff have been deployed at sporting events, music festivals, and around manchester. our correspondent catriona renton has spent the day at st anne's square in manchester. saint and's square has become a focal point for people who want to pay tribute to those who lost their lives on monday night. you will see the carpet of flowers and balloons that has been growing all day as more and more people come here to remember, people have been here since early morning and people still view this evening. earlier the families of some of the victims came here and you could see them reading some of the tributes to their loved ones. among those work colleagues of elaine mciver the off—duty police officer from the cheshire force who lost her life on monday evening. her collea g u es lost her life on monday evening. her colleagues came earlier today and also the family of georgina

callender who brought flowers and balloons to remember their daughter and released 18 yellow balloons. judging that was a second—year student in lancashire. she tweeted before the ariana grande concert she was so excited to see the american star. these families obviously devastated to come here, looking for some comfort and support from the many people who have joined together across the city to support them. i am joined by two people doing just that throughout the day. they are both from mothers against violence. pauline, tell me what you have been able to offer people today? we have offered people comfort. give them a hug and talk to them. just do the people who have had friends or know someone, to give them our

condolences. our heartfelt condolences. our heartfelt condolences. tell them about the service we have to offer, should they need it. that service is known as mav, mothers against violence. we saw the heartbreaking scene of georgina callender‘s mum, releasing those balloons. everybody felt that. you could hear the crowd bursting into applause. with such dignity, a woman who behaved with such dignity. she has been wonderful and reminded me of freedom, the balloons floated off without any stress, it was so light and seeing them climbing the sky was wonderful. you have worked for mothers against violence for a long time, you founded it. we have been working for the past 17 years and to hear something like this today it broke

me because i have lost my son because of a shooting in the city and that is why mothers against violence came into being. the headlines on bbc news: the boss of british airways says a power supply issue was behind eight major computerfailure power supply issue was behind eight major computer failure that left thousands of passengers stranded world wide. the terror threat level which was increased to the highest status of critical following the manchester bombing has been reduced to severe. army bomb disposal experts were evacuated homes in moss side in manchester as part of an ongoing search link to the manchester arena bombing. sport now, and for a full round up, from the bbc sport centre. fellow and good evening. arsenal

have won the fa cup, beating champions chelsea 2—1 at wembley. aaron ramsey scored the winner in the closing stages and it a record seventh fa cup win for arsene wenger, whose future at the club remains at the centre of speculation. let's go live to wembley. that was quite a match. it really was an absolute nailbiter. it really was an absolute nailbiter. it had everything and i think it will go down as one of the great finals. a sending off, a very contentious goal and perhaps, more importantly, the result we just did not expect. because chelsea who won the premier league title if you weeks ago was not the chelsea we saw today and that was arsenal at their very best. it was a makeshift defence but they fought so hard for their manager, a managerwho defence but they fought so hard for their manager, a manager who is matt may be his last.

security guard —— security at a sporting event has rarely been so tight. the response to the manchester arena bombing. wembley welcome the 90,000 spectators for what remains the showpiece of english football. a wreath was laid by the duke of cambridge followed by a period of silence to remember the victims. chelsea arrived as premier league champions and firm favourites. but asked not made a blistering start, opening the scoring through alexis sanchez. the goal finally sanchez. the goalfinally given sanchez. the goal finally given after suspicions of handball and offside in the build—up. it could have been worse for chelsea after two goal—line clearances and there were also saved by the post but they can rally and diego costa beating all but the goalkeeper. chelsea pressed but when moses was

shown a second yellow card for diving they brought a goal and a man down. not for long with diego costa doing what he does best to make it 1-1. no doing what he does best to make it 1—1. no sooner had they finished celebrating that arsenal were back in front with aaron ramsey timing his arrival to perfection. chelsea's dreams of the double over. an otherwise disappointing season for the gunners ending in glory. what the gunners ending in glory. what the result for arsenal. one we did not expect. all the attention will now turn towards arsene wenger's future. was this his final act as manager? van walker tried to get an answer out of manager? van walker tried to get an answerout of him. iam very answerout of him. i am very proud because you see what kind of fight you have when you want

to win one and if nobody has done it before. i am to win one and if nobody has done it before. iam proud to win one and if nobody has done it before. i am proud for having done two things that have not been done, when the championship without losing a game and when seven fa cups. when the championship without losing a game and when seven fa cupsm when the championship without losing a game and when seven fa cups. it is not easy. what now forjulie? will you be here next season? i have a lwa ys you be here next season? i have always been clear on that. we have a board meeting on tuesday, wednesday, it will be clearer. do you want to be here next season?|j it will be clearer. do you want to be here next season? i have always been clear on that. let me enjoy the night. thank you. i'm sure he will enjoy the night. arsene wenger with his seventh fa cup as arsenal manager, a record. a record 13 for the gunners. the last man to walk

off the pitch just down there was john terry, who did not get on today, the chelsea captain. his chelsea career ending a massive disappointment. celtic have won the scottish cup to complete a remarkable treble, adding it to the scottish premiership and league cup, and going undefeated for the entire domestic season. but they left it late to beat aberdeen at hampden park. the game looked to be heading for extra time when tom rogic scored the winner in the second minute of injury time. they might have struggled in europe, but brendan rogers‘ invincibles have dominated the game in scotland in his first season in charge. it has been a dream. you could in at the start of the season and write down what you would do. but i said to the players before the game this isa game to the players before the game this is a game where you want them to write about it afterwards but you have to make history, it doesn't

just happen and the game this is a game where you want them to write about it afterwards but you have to make history, it doesn'tjust happen and they in rugby union, exeter chiefs have won their first premiership title. they needed extra—time to beat wasps 23 points to 20 in a thrilling final at twickenham it was all square after 80 minutes when gareth steenson's late penalty ensured the chiefs — who lost last year's final — were crowned champions. it was only seven years ago that exeter won promotion to the premiership scarlets have won a thrilling pro 12 final in dublin. england's cricketers have taken an unassailable lead in their one—day series against the worlds number one side south africa. put in to bat, england set the tourists a victory target of 331, thanks largely to a century from ben stokes. south africa battled back and took the game to the very final ball but they couldn't get the four runs they needed. england are now 2—0 up in the three match series. lewis hamilton says he's devastated that he'll start the monaco grand prix from 12th the grid. a last chance qualifying run was thwarted when a mclaren crashed ahead, although hamilton felt it

made little difference. kimi raikkonen will start from pole for the first time in nine years, with championship leader and ferrari team mate sebastian vettel alongside him. that's all sport for now. i'll have more in the next hour police in the american city of portland say two men were killed when they tried to stop a man racially abusing two women who appeared to be muslim. the incident happened on a commuter train on friday afternoon. the mother of one of the two girls told the local publication the oregonian, that the attacker was saying that "all muslims should die," and that "they've been killing christians "for years. " portland police have named the suspected killer as jeremyjoseph christian and published a photo of him. the suspect was on the train and was yelling and ranting and raving, a lot of different things including

what he characterised as hate speech. in the midst of his ranting and raving some people approached him and appeared to try to intervene with his behaviour and some of the people he was shouting at. they were attacked viciously by the suspect, resulting in the two deaths and one injury. 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. our correspondent james reynolds has been following developments in sicily. there is the realfault line within the g7 on the issue of climate change. on the one hand you have the sub grouping of the g6, and they now stand against the sub grouping of the g1, its sole member is donald trump's usa. they could not reach agreement in this particular summit, and the final communique said

the six sub—grouping remain committed to the paris climate change agreement. the usa continues to review its policy and donald trump himself is tweeted, saying he will reveal his final decision in a week. it matters because if the usa decide either to withdraw from the paris climate change agreement or reduce its commitments, other countries may be tempted to follow, putting the worthwhile nature of the paris climate change deal in question. radio 1's big weekend has held a minute's silence at the event to remember victims of the manchester bombing. the two—day festival kicked—off with an increased police presence following the atrocity at manchester arena. our correspondent, noel phillips, has been backstage. this is the view from the main stage and we managed to get backstage here

on the main stage to show you the thousands of people who have come out for radio one's big weekend. we think around 25,000 people are in the crowds today. they have come out amid concerns about safety. the act —— there were concerns perhaps whether radio one should go ahead with the festival. the organiser told me earlier today why it was important for the event to go ahead and also he explained that a lot of meetings were held with senior police officers and they took a lot of advice and the number one priority was about safety. here is what he told me. what we have seen today is young people of hull and nearby coming together and seeing, what happened in manchester, we want to reflect the sadness and anger but we also wa nt to the sadness and anger but we also want to say we will go out as normal

and go out and have fun at the festival. it was right to carry on and make sure we got the tone and the mood right and obviously make sure it was safe and secure for everyone. ben cooper talking to me a short time ago. how do people feel about the extra security in place here at radio one's big weekend? with me is chief superintendent christine wilson. tell me about the operation here today to ensure the safety? since the terrible events in manchester we have been doing nothing but reviewing security to make sure this was safe and felt safe for the public and what you have seen some fantastic operations, slick searching, people are having a fantastic time and security is superb. obviously quite a large police presence here today, how many

officers exactly are here? we have hundreds of police officers, our community support officers as well as armed police and in the control rooms, such hundreds of people. we will have to leave the main area because emile sande has taken to the stage. today has been a date when people come together and it shows how much music can unite people and allow people to have fun. eight minutes‘s silence was held at 3pm to remember the victim —— one minute's silence. time to find out how the weather is looting. here's phil. we've managed to cram in some weather on saturday. full on sunshine through to thunderstorms

across northern england and southern scotland. the last of those give way in the north sea from leaving behind rain. generally speaking tonight is fresher than of late so sleeping should not be such an issue. rain is still across the north west of scotla nd still across the north west of scotland and make the most of the dry start in the south because it will not last all day. the chance of one or two thunderstorms and the heaviest of the beam across the south west. we import more muggy conditions through the evening and overnight and across the southern half of the country. thunderstorms not out of the question once more. they will be there in the south—eastern quarter through monday. further north cloud and rain, the driest of the weather in the south—west —— in the south—west. hello, this is bbc news. the headlines at 8.30pm:

travel chaos as british airways cancels all of its flights at heathrow and gatwick for the day, after a global computer ba says it hopes to get passengers onto the next available flights over the bank holiday weekend. we are currently, as you can probably see behind me, a huge queue waiting for any information. my main concern now is that i don't want an 80 rolled grandmother spending the night on the 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 we have greater parity