this is bbc news. the headlines at lipm: police evacuate residents from their homes in part of sunbury—on—thames in surrey as armed officers search a house over yesterday's bombing on the london underground. it follows the arrest of an 18—year—old man in the port area of dover over the attack, in which 30 people were injured. it's a very fast—moving investigation, we've got the full weight of the counter terrorist police network, we've got our colleagues in the intelligence agencies and government helping in any way they possibly can. the uk terror threat remains at its highest level, meaning another attack could be imminent. 1,000 armed police are patrolling across the country. i'm robert hall, live at scotland yard, as the police investigation extends from london to the south coast. also in the next hour:

hundreds of thousands of ryanair passengers are warned their flights could be cancelled over the next six weeks. the new democrat leader vince cable has called on members to regenerate, as he addresses the party at the conference. and in half an hour here on bbc news, i'll bejoined by foreign correspondents based in london to analyse this week's events on our dateline london programme. good afternoon and welcome to bbc news.

an armed police operation is underway by officers investigating the parsons green attack yesterday morning. it comes hours after an 18—year—old man was arrested in dover on suspicion of terrorism. the home secretary has called the arrest ‘very significant‘. the armed police operation currently underway is taking place in sunbury—on—thames in surrey, only 11 miles away by road from yesterday's terrorist attack in parsons green. the bbc understands the operation is focused on cavendish road. a house is being searched and residents close to the property in sunbury are being evacuated. these are some of the latest images. taken by residents and passers—by. armed police swooping on the neighbourhood. 0ne local woman told me that the police arrived and gave her a one—minute to leave with her

children. the metropolitan police have released a statement regarding the operation in sudbury. that is the latest statement that we have had from the metropolitan police, regarding that operation. 0ur correspondent robert hall is at new scotland yard. a lot of developments in the last hour and a lot of developments in the last hourand a a lot of developments in the last hour and a half? we can show you some pictures that we are getting from the helicopter, over the scene, in surrey. surrey police also involved. people who do not know

london that well, it is best described as a suburb of the capital. it is next to the river thames. you can see the police. local residents have been sending photographs. some of them at a distance. we have got this exclusion zone, more on that in a moment. diversions in place and people evacuated from houses. it is a detailed pharyngeal corporation going on in the house on that street. and an operation that began with large numbers of police arriving around lunchtime today, convoys of unmarked vehicles, moving to and from the west side of london during the afternoon. that activity is still intense. i have been talking about local residents, tweeting about it, going on social media. 0ne tweeting about it, going on social media. one of those, has called in

to us. she described what she has experienced, her view this afternoon. anna. hello. it is a robberfrom the bbc. can you afternoon. anna. hello. it is a robber from the bbc. can you tell us a little bit about what you have seen and heard this afternoon?” came out of my house this afternoon, oi'i came out of my house this afternoon, on the way out, and as i walked outside the house, i saw three armed officers. near the outside of my house. as i looked over, one of them turned round, he had a big gun. i immediately put my hands up. he had a balaclava, i could only see his eyes. i was really frightened. he told me to go indoors. i went

indoors, i had my children behind me, sol indoors, i had my children behind me, so ijust went indoors, closed the door behind me. how have things been changing since then? have you been changing since then? have you been able to looked out of the window, seeing things going on, the police moving about?” window, seeing things going on, the police moving about? i am upstairs. i was not sure what was going on. i ran upstairs. and i looked out the bedroom window, i did see loads of police everywhere, other residents coming out of the house. i thought if they are leaving, i do not want to be here. i spoke to a partner. and i said can you as if we can also go? he opened the door, and said can we leave? go? he opened the door, and said can we leave ? they go? he opened the door, and said can we leave? they said quick, quick, quick, in the car. we drove off. and as we got out of my house, on the

back of where they were sort of... shooting guns. i could see an armoured tank thing. big armoured vehicle. the police were also giving out water. it is released experience for you. where are you now? a place of safety? we have just gone down to the local pub. i have got two young children. we want to get them some lunch. it was so scary. i have been shaking like jelly. it must be tremendously shocking. it is a quiet street, saturday afternoon. the last thing that you would expect. you do not expect this sort of stuff, where

you live. we see this in london, but this is a quiet residential area. you get problems with youths, stuff like that, but this was really heavy. it just took me a long time to stop shaking. we are glad that you and your partner and your family rc. thank you for talking to me. we can continue with these pictures. and i can also bring in my colleague. he has been looking at all the information. it has been and over the last hour or so. a sense of the picture so far? we know that this is a joint counterterrorism operation between the metropolitan police and surrey police, involving about 80 officers, 400 people

evacuated. 100 metre exclusion zone around the residential property, this is of significant interest to the counterterrorism police who are investigating having arrested somebody on the port of dover earlier today. add all of this comes in the wake of the device that exploded. also, direct tree lane, we know the direct train goes to wimbledon. it is a half an hour journey. it would have been easy for somebody to travel on one train, on the district line. that could also be significant as this unfortunate. thank you. you're going to keep the information coming. we will bring that to you. i just wanted to take a breath from the breaking developments, it has been a fast—moving operation. it started with that raised this morning, the

arrest followed the intense examination of cctv pictures, any evidence that the police were able to gather from the tube line, local people... 70 videos and photos from the public. back information to the operation to dover. we can re—what has happened. the port of dover this morning, where an 18—year—old man was arrested by kent police on suspicion of terrorism. an arrest detectives described as "significant," and which is directly linked to the investigation into yesterday's explosion on a west london tube train. the arrest is the first obvious breakthrough. nobody died when the improvised explosive device produced a wall of flame in the carriage. that bags on fire... the home—made bomb in a bucket, which detectives believe is linked to islamist terrorism, appears to have failed to detonate

fully, but 30 people ended up in casualty. three of them are still being treated at chelsea and westminster hospital, and last night the uk moved to its highest terrorism threat level — critical — and soldiers were deployed to do some of the work of armed police officers. we have authorised 0peration temperer, which is the initial deployment of a number of troops. they will be deployed to key sites in the uk to free up armed police. and so you will see more armed police on the streets, up to between 500 and 1,000 depending on how the police wish to deploy them. at euston this morning the change in threat level was immediately obvious, with more armed officers patrolling the station. there are seven premier league football matches today and there will be higher security at all of them and at all big public events. we have taken a number of measures,

more armed police on the street, and the public should feel reassured by that. i have been out and about today. the public seem to be positive about the number of officers. the bbc understands detectives have good cctv images of the person suspected of planting yesterday's bomb. officers say they are pleased with the investigation‘s progress. london's mayor siddique khan said that the city will never be intimidated by terrorism, and we will always defeat those who seek to destroy our way of life. daniel sandford, bbc news. with everything that has been going on, a great deal to be discussed at the cobra committee, meeting at lunchtime. it was cheered by the home secretary amber rudd, and she merged to make this statement. i have just chaired a meeting of officials at cobra. i was given an update and i've spoken to

the prime minister who i was able to give an update to. police have made good progress, today they arrested an 18—year—old man in dover, he's been kept in custody and later today will be moved to london. the threat level remains at critical and there will be further investigations as part of the operation today. we urge the public to remain vigilant although not alarmed and we hope to bring more news in due course. has significant could this arrest be, could this be the person who planted the device? this is significant, the police have made good progress but the operation is ongoing and we will have to wait to hear from the police about more information. there have been reports that people behind this may have been known to the authorities. what can you tell us? it is much too early to say that. at the moment we have one arrest, one ongoing operation, when we have more information we will share it.

we have seen pictures of the device, there has been speculation of what was in it. it seems from what experts say as of this was designed to cause huge amounts of damage and destruction. from what you are hearing was it a device that was designed to maim and kill? there is no doubt that this was a serious improvised explosive device, it was lucky that it did little damage although of course we are sympathetic to the people who were affected by it, i believe 26 people were affected by the device. we have to make sure we take all the steps we can to ensure that the sort of materials that this man was able to collect become more difficult to combine together. we must always learn from these incidents. you said the threat level remains critical. when do you expect that to be reviewed again? the independent jtac will always keep this under review, i have spoken to them,

they are maintaining the level at critical. i've spoken to them today. they will let us know when it is time to change it. we also heard from the metropolitan police commissioner, she has been on patrol with officers, stressing the need for londoners to be vigilant but also the need for life to go on, stressing the way that officers are providing security and safety. we have a little bit more from that statement. yesterday's event was absolutely appalling. horrendous. my thoughts and everybody's are with those people who are injured. we had an excellent response. i went to the scene last night. i'm really proud of everybody who coordinated that response. it must have been awful for everybody on that train. especially those who are badly injured. it's a fast moving investigation. we've got the full weight

of the counterterrorist police network. we have our colleagues in the intelligence agencies and government helping in every way they possibly can. we're making very considerable progress, you will have seen the announcement of an arrest earlier on in relation to this. we will continue to work as hard as we can to make sure that we reduce the threat in this country and that we know exactly who it was who did this, whether there's anybody else involved and try to reduce the risk as fast as we possibly can. the threat level remains at critical. we've seen high visibility today from your officers, lots of sniffer dogs around. this will go on for some time? the threat level is set by the joint terrorism analysis centre. they're independent and they will constantly review what is going on in terms of intelligence and investigation. at the moment, it is at critical. that started last night. that means that we've taken a series

of measures in london, where i've been today and yesterday, we have more police on the streets. we have more unarmed police and we have more armed police. the public should feel utterly reassured by that. i've been out and about today. the public seem positive about the number of officers we have here. there's a series of measures to take for the time we are at critical, which means that a threat, sorry, an attack may be imminent... the metropolitan police commissioner, and she obviously keeping a close eye on developments under way. we can go back to those helicopter shots on sunbury on thames. a large number of police, around 60 officers, taking part in an operation that began at lunchtime. it centres on a hose in this estate, close to the river thames. reasonably accessible to the

district underground line. wimbledon, and if you wish to change trains, to parsons green, where the device partially exploded. that operation under way. we also expect the 18—year—old man who was detained by kent police in dover, being passed to counterterrorism officers. expected to be taken to london police station to be spoken to and i suspect we may get another update from the metropolitan police about both of those activities, both of those investigations, later this afternoon. from scotland yard, back to you. thank you very much. and the mayor of london has also issued a statement, we can take you through some of that. this morning, police have made a significant arrest as pa rt have made a significant arrest as part of the investigation into the attack at parsons green, yesterday

morning. and eating your man was arrested in dover, under section 41 of the terror act. the police investigation is ongoing and significant investigation today. i am surei significant investigation today. i am sure i speakfor london significant investigation today. i am sure i speak for london when significant investigation today. i am sure i speakfor london when i say we are incredibly grateful to the police and intelligence services for doing everything possible keeping $1 —— londoners safe. i want anyone with any investigation to call the anti terror hotline, if you can help. it is important that we remain alert and the joint. an increased police presence across london today and this weekend, including additional armed officers, there to keep us safe. london will never be intimidated by terrorism, we will always defeat those who seek

to harm us and destroy our way of life. that was from the mere of london. also some breaking news, it has been reported by avon and somerset police, at least four people killed involving a crash involving several vehicles, taking on the m5. place that is all that we know at the moment. we will have more when we get that. the headlines on bbc news: police evacuate people from their homes as they search a house in sunbury—on—thames in surrey over yesterday's bomb attack on the london underground. hundreds of thousands of ryanair passengers have been warned that the travel could be cancelled over the next few weeks. vince cable has called for the united kingdom to

stay in the european as he speaks at the conference. and in sport, nojoy for roy. crystal palace defeated by southampton, steven davis with the only goal of the game, crystal palace have now lost the opening five games without scoring. sebastian vettel secured pole, starting at the front in singapore tomorrow. behind lewis hamilton by three points, but well—placed to return to the top of the standings. and the stockholm triathlon, was earlier. i will be back with all those stories, and more, at five past five. europe's biggest airline, ryanair, has said it's cancelling up to 50 flights a day for the next six weeks to try to improve punctuality. the move is expected to affect nearly 300,000 passengers, who will be offered alternative flights or refunds.

the airline says it needs to have more planes available on standby. some passengers have already been affected. joining me to discuss this is john strickland, who's an aviation expert. it just seems as itjust seems as though it is a mess? particularly customer services? looking at what ryanair have said today, both on twitter and when i spoke to the directors, they said we messed up. to put some context said we messed up. to put some co ntext o n said we messed up. to put some context on that, it is a very large airline, about 120 million passengers every year. normally very well planned. this year, it has been placed under a different regulatory regime, that they have got to get crew leave into calendar years, rather than financial. that seems to have caught them out. getting to the end of the summer, and pilots have

to ta ke end of the summer, and pilots have to take leave. they are very closely regulated, and they have found that they do not have enough pilots. that has been leading to this large number of cancellations. but surely they would have had noticed that this was going to come into place? ryanair have set themselves, that they have messed up. this would certainly be a headache. planning is one of the most challenging part of the logistics. that would have been something that they would have known about, been working through. at the moment it is not clear. the summer flying programme is certainly there than the winter. pilots working as ha rd than the winter. pilots working as hard as they can do. if they have been hoping that they were able to ove rco m e been hoping that they were able to overcome this, they have had additional problems. particular ad weather incidents, strikes, and that

means you have got pilots on duty, when you are delayed by thunderstorms, you are using pilot hours. in your conversation with the cmo, what has he said with regards to compensation. as far as passengers are concerned , to compensation. as far as passengers are concerned, they are customers, are we going to be looked after? ryanair has got a legal obligation, european union has got regulations, and if you are cancelled or delayed beyond a certain amount of time, for reasons in their control, they have got to pay compensation. ryanair are obligated to do that. but how they handle any additional requests remains to be seen. ryanair offers a simple service at a small price, and in the past they have been combative, but they are conscious that this is egg on the face.

self—inflicted. they have changed the stands over the years, to always getting better. ithink the stands over the years, to always getting better. i think we can see more consolatory approach. also talked about to get more notice than people have been given this weekend, possibly renting aircraft. thank you. well, as mentioned, ryanair released a statement on their website which airline says: "we have operated a record schedule during the peak months ofjuly and august but must now allocate annual leave to pilots and cabin crew in september and october. we apologise sincerely to the small number of customers affected by these cancellations, and will be doing our utmost to arrange alternative flights and/or full refunds for them." that is the statement, from ryanair. liberal democrats have been

gathering in bournemouth for the annual conference. it is the first since vince cable b leader of the party. and our correspondent is there. what has been said today?” think it is going to be a lot of soul—searching at this liberal democrat conference in bournemouth. a lot of thinking about the state of the party, and while it was not doing better at the general election. the liberal democrats are the most pro eu party, you think they would have been the choice of they would have been the choice of the 40% who voted to remain, and jeremy corbyn has been moving more towards the left. liberal democrats believe it is gaping hole in british politics. but remember, at their height, 57 mps, then after the coalition that was single figures. and the general election earlier

this year was not delivering the result that they had hoped for. i asked the new leader, vince cable, how big a challenge he and his party are facing. it was mixed results. we have got more diversity, high—quality, enormous increase in the membership. energy and enthusiasm. but the result did not live up to expectations. i think we are going to turn it round. british politics is becoming polarised between hardline, brexit, hard left labour. people are going to be looking for sensible, moderate middle ground politics. we can provide that. you are obviously up for it, displayed rating a novel and doing other things. you are back in politics. as this are poisoned chalice? it is a challenge but i would not have taken it on unless i was optimistic. we have got a lot of things going for us, british politics has become very polarised.

people are looking for common—sense solutions, not ideological extremes. we can move into that. is vince cable, the new leader, the person to ta ke cable, the new leader, the person to take the party into that space? i think we should expect a lot of talk at this conference about his experience. he was the former business secretary. he is one of the few politicians to protect the financial crash. but at the age of 74, he has decided not to go slowly into retirement, but instead giving himself this rather large challenge. thank you. and we can find out how the rest of the country is looking. it has been a cool day for the stage of september, also very showery. especially eastern england, but in between we have had some greater

moments. rain has been getting into scotla nd moments. rain has been getting into scotland and this is where it will stay. skies clear. winds light. cold night. temperatures at the towns and cities, between seven and ten, but that the countryside it could be cold enough for some frost. not far behind that in northern ireland and the other crowd sports. chilly start tomorrow. more sunshine to look forward to. it should be a dry start forward to. it should be a dry start for most of us. shower clouds build late morning. mainly affecting central and eastern england. feeling warmer, heinz between 15 and 18. hello. this is bbc news. the headlines... counter—terror police have evacuated residents from their homes as armed officers search a house in sunbury—on—thames in surrey

over yesterday's bombing on the london underground. people were injured. at least four people have died after a crash involving several vehicles, including a lorry, on the m5 motorway. the collision happened between junction 16 and junction 14 in south gloucestershire. the motorway is closed in both directions. the foreign secretary borisjohnson has revived his pledge of billions of pounds in extra funding for the nhs, once britain leaves the eu. the un security council calls a meeting to discuss the threat from north korea, as leader kim jong un vows to match the military might of the united states.