thousands of british airways passengers around the world have been stranded or had their flights cancelled, after a massive computerfailure. all flights from heathrow and gatwick were grounded for the day, bringing bank holiday misery for travellers. the airline says it's working to resolve the problem but has yet to confirm when the it will be fixed. here's our business correspondent, joe lynam. this is what happens after a catastrophic it failure: thousands of ba passengers starting their long bank holiday weekend. queues of people snaking out of the door at terminal 5 in heathrow. people have been standing in the queues for up to 70, 90, 120 minutes in some cases. the queue stretches from the check—in desks out to the back of the terminal and down in front of the terminal, where all the taxis deliver people. many passengers contacted the bbc with their experiences. we've just literallyjust now been told that nothing's happening, no flights till 6pm. prior to that we hadn't been told very much at all.

there were no tannoy announcements whatsoever. travelling with my 80—year—old grandma for her birthday. it's a celebration weekend. there's 13 of us going. we've heard nothing. we haven't been offered any chairs, any water, any vouchers. nothing. by this afternoon, the disruption was such that ba took the highly unusual step of cancelling all flights from heathrow and gatwick airport. this is the queue of customers leaving the terminal. and there have been severe delays for ba flights around the world. this isjfk airport in new york. and fiumicino in rome. british airways has cancelled all departures from heathrow and gatwick. customers were handed out leaflets advising them of their rights to a refund and compensation. ba said that a problem with the power supply had caused the it outage, affecting everything from check—in,

to boarding, to baggage throughout the airline's global network and it apologised to its customers. a senior figure in the aviation industry said an it failure of this magnitude was extraordinary and rarely seen. he added that 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 simonjones is at heathrow tonight. what's the news for passengers tonight and tomorrow? the big complaint from passengers during the day was a lack of information. i'm afraid that is continuing into this evening. now the company says it's working tirelessly to get the computers back up and running again. when i spoke to them a short time ago, they couldn't give me any time scale on how long that might actually take. it says overnight it's expecting long haulflights coming into london to be able to ta ke coming into london to be able to take off with a view to landing in the morning. it's hoping services

will resume in the morning, but that seems a hope rather than a firm expectation. so if you are due to travel, the idea is check social media or the website, which is now back up and running, after crashing earlier. thank you very much. the g7 summit of world leaders in sicily has broken up without reaching an agreement on climate change, after donald trump refused to commit to the deal to cut carbon emissions. six world leaders — including theresa may — reaffirmed their commitment to proposals agreed in paris two years ago, but president trump took to twitter to say he would make a decision on whether to sign up next week. here's our diplomatic correspondent, james landale. this summit was all about one man and whether he was ready to stand shoulder to shoulder with these fellow leaders to tackle the world's problems. well, donald trump did turn up, but he didn't always look comfortable. he refused to reaffirm his country's commitment to curb carbon emissions, to the anger of his allies. translation: the entire discussion about climate was very difficult,

if not to say very dissatisfying. we have a situation where six, and if you include the eu, seven, are against one. with all the sport — and there's a lot of it — here's karthi gna nasegaram at the bbc sport centre. fourfinals in fact, simon. we'll start with the fa cup, which was won by arsenal for a record 13th time. and their manager, arsene wenger, also has a new managerial record, lifting the trophy for the seventh time. afterwards, wenger admitted that he will reveal whether he will stay at the club or not this week. david ornstein reports from wembley. security was understandably tight as

wembley welcomed 90,000 fans for the show piece of english football. after an impeckably observed minute's silence, arsenal made a blistering start, opening the scoring through alexis sanchez. sanchezisin scoring through alexis sanchez. sanchez is in to score. the flag is up. the goal finally given after suspicions of handball and offside in the build—up. it could have been worse for chelsea. gary cahill making two clearances, they were also rescued by the post. the premier league champions suffered a further setback after half—time. victor moses shown a second yellow ca rd victor moses shown a second yellow card for diving. but that briefly rallied the ten men. diego costa with the equaliser. no sooner though had chelsea finished celebrating, than arsenal we re finished celebrating, than arsenal were back in front. alan ramsey timing his arrival to perfection. his club now the most successful in the competition's history. at the end of a vintage fa cup final chelsea's dreams of the double are

ended by arsenal. an otherwise disappointing season for the gunners finishes in glory. this team has suffered and united and responded. i said last week this team will win the championship, with one or two buys and keep them together and i think we are on a goodway. despite today's success questions remain over the future of arsene wenger, whether he stays or goes, he has certainly made his mark. it was also a record—breaking day for celtic, who have won a treble of trophies without losing a domestic match all season. today brendan rodgers's side won the scottish cup after beating aberdeen 2—1. patrick gearey reports. for weeks now celtic have been taking the applause, hailed scotland's champions, a final short ofa scotland's champions, a final short of a treble. aberdeen have been closer to them than any other side. their motto, stand free. just as

their midfielder hayezs did in the 99th minute. celtic responded. armstrong the scorer. aberdeen had been ahead less than two minutes. now we had a final, full—blooded stuff. the last team to beat celtic in any competition was barcelona, a cause for aberdeen‘s inspiration rather than fear. the only problem, the final moment. and celtic were coming. close ter seemed with every attack. roberts within inches. by 90 minutes the dons were hanging on. stoppage time. a young man from australia who was about to become a legend. victory and history that means more for having had to fight for it, celtic, scotland's invincibles. rugby union's premiership final also had a exhilarating finish, which saw exeter crowned champions for the first time in their history. it was 20—20 at the end of full time against wasps. of full—time against wasps.

but a late extra—time penalty from gareth steenson made history for exeter, who were promoted to the premiership seven years ago. and in the pro 12 final, welsh side scarlets defeated munster 16—22 in dublin to lift the trophy for the first time in 13 years. and england have beaten south africa by two runs to win the one—day international series. thanks, karthi. the biggest music event to take place in the uk since monday's terrorist attack is being held in manchester tonight. the courteeners — a local band with a huge following — have sold out the 50,000 capacity old trafford cricket ground. it was originally planned as a celebratory hometown gig but has now taken on a very different meaning. 0ur entertaiment correspondent, colin paterson, is there. this gig sold out six months ago. after monday's bomb attack, the band decided it would still go ahead. their singer told me why. if this hadn't happened it would have sent

out a bad message, ithink. people shouldn't be allowed to go — people shouldn't be allowed to go — people should be allowed to go and enjoy themselves without being scared. we we re themselves without being scared. we were absolutely coming because it's what we do, it's what we love. we are not going to be deterred by anybody or anything. we are not going to be deterred by anybody or anythinglj we are not going to be deterred by anybody or anything. i am a married man andl anybody or anything. i am a married man and i have a kid but at the end of the day you have to live your life. you have got to live your life. you have got to live your life. now this is not normal at a gig to have armed policemen on the door. but even with this level of security some die—hard fans have chosen to stay away. first time i saw the courteeners. .. liam chosen to stay away. first time i saw the courteeners... liam has attended every gig of the courteener since tonight. he told his tickets. i would be focussing on if i saw anything suspicious, i wouldn't be listening to the music, i would be watching everything else. but abbey and pete weren't going to let their day be spoiled. they already decided to turn the gig into their wedding reception, buying 68 tickets for guests. what we do in manchester is

we go to gigs and that's why we had the wedding we had. we carry on and we are with our mates tonight at our favourite band, we are going to do manchester proud and have a big party. but tonight has also been about remembering those killed on monday. this is our manchester. our manchester! and the bees still buzz. that's it from us. good night. good evening. welcome to bbc news. thousands of british airways passengers around the world have been stranded or had their flights cancelled after a massive computer failure. all flights from heathrow and gatwicks were grounded for the day bringing bank holiday misery for travellers. the airline says it's working to resolve the problem. but has yet to confirm when the problem

will be fixed. here is our business correspondent. this is what happens after a catastrophic it failure: thousands of ba passengers starting their long bank holiday weekend. queues of people snaking out of the door at terminal 5 in heathrow. people have been standing in the queues for up to 70,90, 120 minutes in some cases. the queue stretches from the check—in desks out to the back of the terminal and down in front of the terminal, where all the taxis deliver people. many passengers contacted the bbc with their experiences. we've just literallyjust now been told that nothing's happening, no flights till 6pm. prior to that we hadn't been told very much at all. there were no tannoy announcements whatsoever. travelling with my 80—year—old grandma for her birthday. it's a celebration weekend. there's 13 of us going. we've heard nothing. we haven't been offered any chairs, any water, any vouchers. nothing. by this afternoon, the disruption

was such that ba took the highly unusual step of cancelling all flights from heathrow and gatwick airport. this is the queue of customers leaving the terminal. and there have been severe delays for ba flights around the world. this isjfk airport in new york. and fiumicino in rome. british airways has cancelled all departures from heathrow and gatwick. customers were handed out leaflets advising them of their rights to a refund and compensation. ba said that a problem with the power supply had caused the it outage, affecting everything from check—in, to boarding, to baggage throughout the airline's global network and it apologised to its customers. a senior figure in the aviation industry said an it failure of this magnitude was extraordinary and rarely seen. he added that 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. earlier i spoke to the architect and tv presenter george clarke and he had been at heathrow airport. i have actually just left had been at heathrow airport. i have actuallyjust left terminal 5,i i have actuallyjust left terminal 5, i have managed to get out and i am ina 5, i have managed to get out and i am in a cab on the way back home. i was supposed to be on the beach, in ibiza now with the kids enjoying half—term. that was one of the most turbulent badly organised days that i have ever experienced in britain andi i have ever experienced in britain and i am slightly embarrassed by it to be honest. i realise when such a major it infrastructure goes wrong, that's going to cause massive repercussions, i understand that, i get that. i don't think anyone really had problems about flights cancelled, that's fine, it's one of

those things, but the lack of communication all day, there wasn't a single tannoy announcement, not one, all day in the main departures terminal. we didn't have a single member of staff come up to us at any point to explain what was going on. i think point to explain what was going on. ithinka point to explain what was going on. i think a lot of the staff didn't even know what to do, i don't think it was even relaid to them from above about the issues. i can't understand why we were even checked in this morning, i got there at 9. 30 am with the kids and the system was down and they struggled to check us was down and they struggled to check us in, if you can't check us in and giving us a boarding pass, then how can you have flights planned and the technical data that you need? i have been told by one of the crew that they didn't have a flight plan so that's why they weren't able to take off. on that's why they weren't able to take off. 0na that's why they weren't able to take off. on a simple level they had passengers there and planes there and pilots there, it was all there but didn't have the information that they needed to do the checks and bala nces they needed to do the checks and balances for us to take off safely and obviously safety is paramount, i get that but the lack of

communication, the lack of any information from any staff at any point of the day was woeful to say the least. that was the tv presenter george clarke. we will be finding out how this story and others are being covered in sunday's front pages in about 15 minutes. guests joining about 15 minutes. guestsjoining me, the deputy head of sport at the sun, martin lipton and the evening standard columnist rosamund urwin. police, investigating the terror attack in manchester, have tonight released cctv images of salman abeidi, the man who carried out the bombing, on the night of the attack. they are appealing for information on his movements in the days before. detectives said they were building up a detailed picture of abedi, his associates, finances, and the wider conspiracy behind the attack. earlier, two more people were arrested. from manchester, our home affairs correspondent, tom symonds, reports. in a crowd, he would

barely have been noticed. this is the manchester bomber, on the night he murdered 22 children, women, and men. a rucksack on his back, he'd flown in from libya five days before. police have released this picture, its background removed because they want information about what he did in that time. day and night they've crisscrossed manchester, raiding buildings, arresting people. this was moss side this morning. the area was cordoned off for a while with a bomb disposal team on stand—by. there is no letting up. there were three more arrests overnight. we now have 11 men in custody. there is now 17 searches either concluded or continuing on various addresses, largely in the north—west of the country. in another raid this morning, armed officers blew open this door in cheetham hill, a suburb in north manchester. about three o'clock, i heard a

blast. waking neighbours and making yet more arrests. local people have helped us establish 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. tonight they revealed that, after the bombing at 10:33pm on monday night, forensic officers went straight in to examine the aftermath. within two hours, they'd identified the bomber, possibly from id found on his body. they've tracked his movements from the family home to the flat he's said to have rented before disappearing to libya, returning on the 18th of may, to move into a city centre apartment where the bomb was likely put together. they've pieced together his network. friends and relatives are in custody. they're gathering

financial evidence of who backed him but, crucially, they now know how the bomb was put together. that will help them judge the ongoing threat of another attack. people continue, as requested, to report their concerns. tonight again, the police were checking suspicious items, this time near manchester's main station. the bomb disposal team again on stand—by. the prime minister has announced that the threat level facing the uk is being reduced from critical to severe —— following the significant progress in the investigation. it means that an attack is no longer regarded as "imminent", but remains "highly likely". in manchester, more flowers were laid in memory of the 22 victims of the attack. and the parents of 18—year—old georgina callendar, who died in the bombing, paid a moving tribute to their daughter. judith moritz reports. visible and armed, the police out

on the streets, there both to protect and reassure the crowds. they're on hand for photos, but the armed police out on the streets are there to protect and reassure the crowds. the threat level has been lowered, an attack considered highly likely rather than imminent. but soldiers will continue to support the police until monday at midnight. the independentjoint 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 vigilant. it means that 1,300 events, happening across the country this weekend, will remain under heightened security. at wembley, the fa cup, between arsenal and chelsea, passed off peacefully. at the let's rock festival in shrewsbury, the police mingled with the audience. and every one of the 50,000 spectators at radio 1's big weekend in hull are being searched at least once.

the effect of the arena attack has been felt by millions of people and thousands have now been to pay their respects to those who died. 18—year—old georgina callander was killed in the blast. her mum was frantically trying to find her after the concert. today, she spoke about the moment that she discovered her daughter. there she was on the stretcher. they were working, doing resuscitation and taking her down the stairs. i was just screaming and shouting at her. i was rubbing her hands. i was rubbing her tummy. i was rubbing herface. all the images are so vivid now. i can see everything.

this evening, the teenager's parents laid their flowers alongside the others at the memorial which has become a focal point for manchester's grief. and then balloons flying free. there was applause, respect and love for a family needing comfort at this, the hardest of times. the headlines on bbc news: the boss of british airways says a power supply issue was behind a major computer failure that has left thousands of his airline's passengers stranded worldwide. 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.

police release cctv images of manchester bomber salman abedi on the night he committed the attack, as part of a public appealfor information. now all the sport. we'll start with the fa cup, which was won by arsenal for a record 13th time. david 0rnstein reports from wembley. wembley welcomed 90,000 spectators for what remains the show piece 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 arsenal made a blistering start, opening the scoring through alexis sanchez. sanchez is in to score, the flag is up. the goal finally given after suspicions of handball and offside in the build—up. it could have been worse for chelsea. gary cahill making two clearances, they were also rescued by the post. diego costa with the equaliser. chelsea pressed but when moses was shown a second yellow card for diving they were a goal and a man down. not for long, though. costa doing what he does best to bring the ten men level. diego costa levels for chelsea. but no sooner had chelsea finished celebrating, than arsenal were back in front. aran ramsey timing his arrival to perfection. ramsey scores for the gunners!

chelsea's dreams of a double over. an otherwise disappointing season for the gunners ending in glory. iam very i am very proud because you see what kind of fight you have when you want to win one and you have to go for it all round and if nobody has done it before, you know, iam proud for having done two things that have not been done, win the championship without losing a game and win seven fa cups, it's not easy. what now for you, everybody wants to know will you, everybody wants to know will you be at this club next season?” have always been very clear on that, we have a board meeting on tuesday

andi we have a board meeting on tuesday and i think wednesday, thursday, will all be clearer. do you want to be here next season?” will all be clearer. do you want to be here next season? i always been clear on that. thank you. let me enjoy the night. congratulations, enjoy the night. congratulations, enjoy it. thank you. iam sure enjoy it. thank you. i am sure he is enjoying the night. it was also a record—breaking day for celtic, who have won a treble of trophies without losing a domestic match all season. they left it late to beat aberdeen. they left it late to beat aberdeen. the game looked to be heading for extra time when the winner came in the second minute of injury time. they might have struggled in europe but the invincibles have dominated in scotland in brendan rodgers' first season in charge. rugby union's premiership final also had a exhilarating finish, which saw exeter crowned champions for the first time in their history. it was 20—20 at the end of full—time against wasps. but a late extra—time penalty from gareth steenson made history for exeter, who were promoted to the premiership seven years ago. and in the pro 12 final, welsh side

scarlets defeated munster 116—22 in dublin to lift the trophy for the first time in 13 years. they ran in six tries. an historic day for the team who become the first welsh champions for five yea rs. first welsh champions for five years. they've done it by winning twice in ireland in the play—offs, first against leinster and now the table—topping munster. and england have beaten south africa by two runs to win the one—day international series. england set the tourists a target of 331 thanks largely to a century from ben stokes. south africa battled back and only needed seven runs from the final over but mark wood was england's hero with the ball and england's hero with the ball and england held on to win by two runs. george groves has become a boxing world champion. he had a stoppage victory. this was his fourth attempt

ata victory. this was his fourth attempt at a world title. there were emotional celebrations when the fight was stopped with the londoner throwing unanswered punches. afterwards he dedicated the win to his former opponent who remains in hospital after slipping into a coma following their fight. that's all the sport for now. more in the next hour. first here is the weather. hello. we crammed in a lot of weather across the british isles during saturday. sunshine for some. the temperatures really responding to that. but you can almost bet at this time of year after the sort of heat spell we have had you end up with a lot of this sort of thing, thunder storms really breaking out widely across north norfolk and moving into the north of england, southern scotland through the afternoon into the first part of the evening. looking ominous for some. then just evening. looking ominous for some. thenjust turning evening. looking ominous for some. then just turning downright wet. hailand then just turning downright wet. hail and lightening, spectacular for many. then a favoured few, missed

all of that and had a really glorious day. into the small hours we will see the last of the storms moving through the eastern side of scotland and off into the north sea. west keep ago fairamount of into the north sea. west keep ago fair amount of cloud and rain, for the western side of scotland. a slightly fresher night for sleeping. temperatures in a range of about nine to 15 or so. then sunday, still the remanents of saturday's rain across the north—west of scotland, gradually creeping further north and east. make the most of the dry start across the south—west, it will not last. some of the rain again heavy, wouldn't rule out thunder in there again. the opposite end of the country, that rain lingering, murky across the northern isles. the mainland beginning to dry up, brightening perhaps across the south—west. then across the north channel into northern ireland, decent afternoon. so too for much of the north of england, northern wales but clouding all the while to the north