hello and welcome to bbc news. president trump has thanked iran for what he called a very fair negotiation that led to a prisoner exchange between the two countries. an iranian scientist who had been arrested in the us was swapped for an american phd student jailed in iran. authorities in the us are investigating the motives of a saudi gunman who shot dead three people at a military base in florida. the air force trainee was shot dead after opening fire in a classroom at the naval air station in pensacola, where he was receiving training.

scientists say a new report which shows the earth's oceans are becoming starved of oxygen is further evidence that urgent action is needed to cut greenhouse gas emissions. the findings suggest larger fish are being affected both by global warming and pollution. questions are being raised about russian interference in the uk election after possible links emerged between russia and leaked documents detailing trade talks between the united states and the uk. our political correspondent jonathan blake reports. a leaked government document, highlighted by labour, containing details of initial discussions on trade between uk and us officials. its authenticity is not disputed. what it proves has been hotly debated. how it came to be made public is unclear. jeremy corbyn campaigning in wales today as the online news site

reddit, where the document first surfaced, said it was posted by an account linked to a campaign originating in russia. he insisted publishing the document was in the public interest, and argued the government should release a parliamentary report into russian interference. the prime minister has answers to give, which he refuses to do, about russian donations to the tory party or the report that he is sitting on about russian interference in british politics. of course there should be no interference in our british political system by donald trump or the russians. promoting money for grassroots football in england on a campaign visit in stockport, borisjohnson said the government had played by the rules, but acknowledged the source of the leak needed to be found. i do think we need to get to the bottom of that. as far as i am aware, we haven't yet established the truth about that. but what i certainly think is that document, whatever it was intended to prove, did not prove whatjeremy corbyn and the labour party hoped

that it would prove. campaigning for votes in st albans, jo swinson said any sign of foreign interference was worrying, but singled out borisjohnson for not yet publishing the mps‘ report. it's shocking that the prime minister is sitting on a report from the intelligence and security committee into this very topic, into whether or not russia or other countries have tried to interfere with our democracy. the prime minister has decided that he will keep that secret, and that is appalling. the party leaders sounded serious today on this subject of foreign interference, but from now on, expect them to focus firmly on their main messages to voters as the campaign enters its final days. jonathan blake, bbc news. tim maurer is the co—director of the cyber policy initiative at the carnegie endowment and author of cyber mercenaries: the state, hackers, and power. thank you forjoining us on bbc news. let me ask you, first, how can we know at this present point that

russia is behind these leaks, and indeed, who in russia potentially could be behind these leaks? hackers, the kremlin? at this point, russia stands accused of being behind the leak of these classified documents, but detailed evidence has not been made public yet. what we do know is that reddit remove several dozen accounts because their behaviour was very similar to that ofan behaviour was very similar to that of an operation dubbed secondary inspection, whose scale and complexity suggest that it is a highly sophisticated actor who over a prolonged period of time has been behaving this way, which suggest that it behaving this way, which suggest thatitis behaving this way, which suggest that it is at least state sponsored, if not directly an intelligence agency. in short, at this point in time, ithink agency. in short, at this point in time, i think it is accurate to say that we can assume with medium confidence that this is tracing back to russia and is with the involvement of russian government actors. 0k,

involvement of russian government actors. ok, so why would russia or the russian government want to get involved in the uk election? the joint assessment of the us intelligence community analysing the 2016 election interference has highlighted that moscow is a p pa re ntly highlighted that moscow is apparently intent on undermining democracy, and the various alliances among nato members, among eu members. so from that perspective, moscow is focusing on exploiting existing divisions within society, and essentially trying to throw some additionalfuel and essentially trying to throw some additional fuel to and essentially trying to throw some additionalfuel to the and essentially trying to throw some additional fuel to the fire and trying to drive people aside, so that systems in countries like the uk are becoming weaker, which is in the perceived interest of moscow. and of course, there is a marked difference, isn't there, in the way that the targeting or the alleged targeting happens in europe compared to america, and indeed, a difference in how europe and america react to it. moscow has clearly

differentiated between countries in how they are going about these influence operations, which are very similarto influence operations, which are very similar to what we have seen in the days of the cold war. if you look at france, for example, there is evidence of some election interference, but in germany, very little happened. so there is clearly differentiation happening, but the key difference i think is how governments and how countries have responded. in most european countries this has risen to the top. it is the top leadership that is involved, whereas in the us it has been individualfederal agencies rather than the white house that have been focusing on this issue. thank you so much forjoining us on bbc news. thanks for having me. britiain‘s anthonyjoshua has regained his world heavyweight boxing titles. in a rematch of their fight from june in new york, joshua gained revenge over mexico's andy ruiz. the fight took place at a purpose—built15,000—capacity outdoor arena in the saudi capital, riyadh, with joshua winning the contest on points at the end of 12 rounds. our sports editor

dan roan was there. well, a great atmosphere here on the outskirts of riyadh, as you can see, the fans streaming away from the arena behind me. and they've seen a piece of history, because huge relief, redemption, the restoration of anthonyjoshua's credibility, really, here this evening. he regains his three world heavyweight titles. he joins an elite band of boxers to have achieved that. just the fourth, in fact, in boxing history to do so at the first attempt. as he made his way into the ring earlier on, he will have been under no illusions that it was really make—or—break. this was a fight he simply couldn't afford to lose after that shock defeat to his mexican opponent, andy ruiz, in new york back in june. and i think he learned from that, because he boxed clever. he kept his distance, he was cautious, took a safety—first approach, didn't let

the mexican get too close. stayed out of range of those powerful punches that caused him so much trouble just a few months ago. he was in a little bit of trouble in the eighth round. but really, other than that, he was never really in doubt, and he built an unassailable points lead. and in the end, he prevailed by a unanimous victory, and there were great scenes of jubilation and celebration at the end. now, both boxers did say that they would be up for a third fight between the pair in the immediate aftermath of the bout, but there will be many british boxing fans who will now hope that, with this victory, joshua can perhaps go on and become the undisputed world heavyweight champion by taking on deontay wilder of the united states, perhaps his fellow british boxer tyson fury, maybe, in the coming months and years ahead. certainly, with this victory, he gets his career back on track, and takes his place

very much at the top of what is a compelling heavyweight division. well, crucially, he didn't get too close to ruiz. in that first bout in new york, he got within range and he got hurt, and after that, he was on very unsteady legs and very vulnerable. and i think he learned from that, so this time he very much kept his distance. and as you can hear, many fans came over from britain and mexico as well, it was controversial, of course, the choice of location for this fight, because of saudi arabia's human rights record. there were plenty of people who felt uncomfortable and suggested this was part of an attempt to sportswash the reputation and image of the country. but i think saudi arabia will be delighted, the local authorities, the organisers, with how it went. because it was a masterclass boxing performance by joshua, a defining performance, and a historic one too, and it gets his career very much on track. the boxers have been speaking about the fight. first let's hear from mexico's andy ruiz. he told reporters he wants a rematch and explained what went wrong. i was slimmer.

i put on the weight and — it was my mistake, you know? and i think i felt too confident, and all that, but i think i should have trained harder. i should have did, and listened to my team and to my coaches. you know, nobody really knows about the training that we had, you know, but we did the best we can, and ijust can't wait for the next fight. he won one, i won one, so let's do the trilogy. look, i... i can knock people out when i want to, and i can box when i want to, so tonight was just about winning, and trusting my process. maybe i could have done more times, but sometimes simplicity is genius.

and that was the motto, is keep it simple, 'cause it's going to lead to a genius performance. so it was outclassing the current champion, and just kind of proving to myself that every time i step in the ring, sometimes i may take a loss. but if i prepare myself for it, i don't think anybody is going to beat me. ijust took it back to the old school, '705—style, boxing, sweet science. hit and don't get hit, that's the name of the game. anthonyjoshua is a british professional boxer who came to the world's attention following his success in the olympics. he was born in england, but he is also a major star in nigeria. his mother and father are both nigerian. our reporter mayeni jones spent the evening with his fans in lagos. the way he boxed was how i wanted him to box.

and how beautiful it was, a boxing masterclass. yeah, heavyweight champion of the world again. anthony joshua is british but his parents are from nigeria. does this feel like a win for nigeria? it feels like a fricking win! it feels like a win. he is nigerian, we have to support him. yeah, he's nigerian, through and through. very proud of him. how does it feel to see a nigerian be a heavyweight world champion? it's awesome. aj is making us proud, doing big things. looking forward to a successful career for aj. and does it feel like a win for nigeria, or not really, because he is british? aj's real. aj's british, aj's nigerian, aj's for the world. aj's big. numberone, aj! how does it feel, as a nigerian, to see anthonyjoshua win? does it feel like a win for nigeria? i mean, it definitely does feel good, but that is a little bit dampened by the fact that the british anthem played, not the nigerian anthem.

least he could have done was play both. we repped for him hard in nigeria. everybody knows he is always here, we rep for him hard. i feel he should have played the nigerian anthem as well. and you can find much more on anthonyjoshua's victory on our website. just log on to bbc.com/news. this is bbc news. the headlines: the us and iran have carried out a prisoner swap in a rare sign of cooperation between the two countries. the saudi air force officer who shot dead three people at a naval base in florida is reported to have played videos of mass shootings at a dinner before the killings. britain's longest—running rail franchise has reached the end of the line tonight. virgin trains, which has been operating the west coast mainline between london and glasgow since 1997, ran its final service

from london euston to wolverhampton at 9:10. the route will be taken over by the new operator, avanti. kevin fitzpatrick reports. there have been a few different looks over two decades and virgin introduced us to the tilting trains. but not everyone is a fan of the on—board entertainment. awfuljokes in the toilet about what you cannot throw down. goldfish, for one. for many passengers at crewe station the company has done a good job. virgin trains were brilliant. i don't know how it will affect us now. service was good and the trains were clean. i know they say it is going to be better but i can't see how. i fear that it will actually be worse. it is certainly the end of an era. avanti west coast promises more services and new trains. but from tomorrow you will just notice different logos and different jackets on the staff. virgin could not bid to continue its franchise due to problems with pension liabilities and its partner

business, stagecoach. both companies are suing the government over it. they transformed travel up and down the country. shame it is ending, but hopefully we will have a new company who can take things even further forward. one passenger is excited, however. i spoke to a lady in there now who showed me the logo. you like the new logo? yes. it is a sexy logo. like the italians. the last virgin train to leave the station will depart 11 o'clock tonight. north korea's central news agency is reporting a "very significant" test has been carried out, at its sohae satellite launch site — but — they did not specify what was tested. the site has previously been used to launch rockets into space. the reported test comes after north korea warned it could take a "new path" in view of the stalled de—nuclearisation talks with the united states.

in australia, firefighters say a fire burning north of sydney is now bigger than the city itself. they're warning that it's currently too big to put out. there are around a hundred bush fires burning in new south wales — half of which are said to be out of control. many residents have been forced to leave their homes, as phil mercer reports. a twisting column of flame, a fire in queensland advances across dry grassland, threatening homes. the crisis in eastern australia is into its fifth week. the authorities are warning that some of the bushfires are too big to put out and will only be extinguished by heavy rain. there are 100 blazes in drought—hit new south wales. half are burning out of control. residents and animals have been forced to flee as the flames bore down on their communities. so at any time, it mightjust come over this side, so we will just leave.

more than 2,000 firefighters, many of them volunteers, are on the ground in new south wales. their task is exhausting and unrelenting. it's dangerous, too. a water—bombing helicopter has crashed landed near the city of newcastle. the pilot escaped with only minor injuries. sydney is again shrouded in a toxic, smoky haze, blown in from nearby bushfires. bushfires are common in australia, but scientists believe this year they have started earlier and have been more intense due to global warming. a brutal summer lies ahead. phil mercer, bbc news, sydney. tens of thousands of people are taking part in the world's big sleep out — to raise awareness about homelessness. an estimated 100 million people across the globe don't have a home. sleep outs are being staged in 52 countries —

including here in the uk. our news reporter gareth barlow is at one of them — in london's trafalgar square. it looks like it is wet and rainy where you are, not a great night for this. it is absolutely pouring down. it is 2am here and it is very unpleasant. centre of london, the iconic trafalgar square. there is the column, there is the christmas tree but underneath that, 2000 people camped out in the wind and the rain. it is now 11 degrees, and they are taking place in the world's big sleep out that is raising a profile and raising muggy for millions of people around the world who experience homelessness. i am joined by dame casey who is the chair. why are you doing this? joined by dame casey who is the chair. why are you doing thi57m seems absolutely bloodied crackers right now, the rain is so heavy but we do it because basically the world has a homelessness problem. it has a

displaced people problem, it has refugees. and all of these people are here tonight walking in the shoes of people who are homeless or people who are refugees. we're just experiencing it for one minute, something that people have experience all year round. so it is a privilege to be here this evening, wet and cold as it is. and we have 62,000 people across the globe sleeping out yesterday, tonight and tomorrow. doing exactly the same thing. in 2005, the un estimated around 100 million people around the world do not have a home. is the situation getting better or worse? the truth of the matter is that this is really tough. homelessness is getting worse. if you think of things like the war we have had across the globe, floods, all sorts of things that displaced people all the time. some of these people are poor and they cannot cope. it is not just homelessness in places like uk

wear i'iow just homelessness in places like uk wear now we have the highest number of people sleeping out in the streets than we have ever had. it is a global problem and the un, as you said, estimate that next year we run into, where homelessness is prioritised for the first time. it is important for us that over 60,000 people sleeping rough tonight, as a gesture, as a moment of solidarity and compassion and that runs us into the campaign next year with the un. just briefly, do you think there is not enough compassion? we need to ca re not enough compassion? we need to care more for who do not have a home? 0h, care more for who do not have a home? oh, my god, yes we do. the world is divided and fractured and this is symbolic. we do care. we are kind and we can be compassionate. and that is what these people are doing here tonight. thank you very much indeed. the sleepout continues and the rain continues falling and the message here is around the world, that this is the everyday

life for millions of people. the south west of england is a key battleground between the conservatives and the liberal democrats in the general election. the lib dems lost all their seats across the region to the conservatives in 2015, but the party came within just a few hundred votes of retaking st ives in 2017. our south west political editor, martyn oates, has been to the constituency, to find out what issues voters are concerned about. the south—west‘s most marginal seat is a place of geographical superlatives. its southernmost tip is also the most southerly point on the british mainland. a magnet for tourists in the warmer months, the winter morning sees it full of locals. many with trenchant views on brexit, politics and shifting party allegiances. anything less than ao—year—old in the way of infrastructure was built with eu money. the government will not replace that. they will abandon cornwall happily because it has no effect on them, especially if everyone votes lib dem.

i think brexit should happen. i have always voted labour but i cannot vote forjeremy corbyn in any shape or form. the way he feels about brexit. i am going to vote liberal down here. because it is the one way of making sure that our dear beloved tory mp does not get back. it's taking too long. i am bored with it. this constituency includes both the peninsulas. across the great sweep of manx bay is penwith. home to mainland britain's most westerly town.

low granite houses defy the atlantic gales, a legacy of west cornwall‘s once great but now long disappeared tin mining industry. the local butcher, a lifelong resident, gives me a warts and all thumbnail sketch of the town today. it is a very expensive part of the country to live in. house prices are through the roof. it might look like the dream but it actually is not. it could be a nightmare. the cavern between average house prices and average earnings is a problem across connell. but particularly acute here. the sixth constituency, st ives, has the second highest average house prices and the lowest average earning. brexit or no brexit, the search for a political solution to this huge disparity remains a burning issue here. there is a lot of very rich and a lot of very poor and a massive gap in the middle. so what we need down here is that gap narrowing. and it is one of those situations where the money tends to stay within the rich and the poorjust

seem to be getting poorer. but to change the political weather here, the anti—brexit liberal democrats need to woo an electorate that voted by 55% to leave the eu. and this is not one of the handful of south—west seat where the greens have agreed to fall by the wayside to help the lib dems navigate their way back to sunshine. st ives is arguably the one constituency where it might have sped their journey. fans of winnie the pooh have gathered on the edge of the hundred acre wood for the official opening of pooh—seum. it's estimated that, every year, 40,000 people visit the area in the ashdown forest in sussex, which inspired the much—loved works of aa milne and eh shepard. charlotte wright reports. nestled in the hundred acre wood, pooh corner in hartfield has been a tourist destination for decades but now, for first time,

visitors can come here to learn about the history behind the bear of very little brain. the aim of the museum was to ensure that, when people came from japan, america, australia, canada — seeing as there's links to canada with the original bear — was to be able to tell the story here so they could go and play a game of poohsticks, they could then come into hartfield and sense what the village was like and also actually learn something and see what life really was like and engage with the people behind the books. the museum is free to enter with artefacts on display dating back years. so this one here is a presentation copy for ernest h shepard from aa milne. so essentially they gifted one to each other. all: three, 2, i! the pooh—seum is open! and who better to open it than a former friend of aa milne's son, cristopher? christopher robin would be thrilled with the pooh—seum at pooh corner, he really would be, because it is a celebration, notjust of winnie the pooh, but of the world of aa milne. and the owners hope the museum

will help preserve that world in the place where it all began. now let's have a look at what the weather has in store for us. hello there. we have seen the rain sweeping in, the winds really picking up as well and, really, over the next few days, it is going to be quite a stormy spell of weather. some heavy rain but it is the strength of the winds that is going to have the biggest impact. there are a number of met office warnings that you can see on our webpages. the main driver is this area of low pressure here, that's forcing that weather front and that band of rain right the way across the country and then, behind that, well, we're seeing skies clearing and we'll see some showers returning, and the winds maybe touching 60 miles per hour, northern and western scotland through the irish sea. keeping the temperatures up on the mild side, come the end of the night. and really, for sunday, it's going to be a mixture of sunshine and heavy showers. not too many showers perhaps for eastern parts of england, more frequent in the west,

and merging at times to give some longer spells of rain in northern ireland, western scotland and the north—west of england. maybe a touch wintry over the higher hills. temperatures seven degrees, scotland, northern ireland. still 13 perhaps in east anglia and the south—east of england. tempered somewhat by the strength of that strong and gusty wind, really picking up in ireland. and we are going to find storm atiya really strengthening those winds during the evening and overnight, pushing them into wales and the south—west, where here we're looking at gusts of 70 miles an hour, possibly even a touch more than that, together with some squally bursts of rain. moving into monday though, things slowly calm down from the west as this ridge of high pressure moves in. for most of the day the strongest of the winds will be down those eastern coasts of england and scotland. together with a fair number of showers first thing. those become fewer. most places become dry. still going to be a windy day but the wind will gradually lessen,

throughout the day. we'll see our first spots of rain perhaps arriving in northern ireland by the end of the afternoon. out of that, temperatures only five, six degrees in eastern scotland, north—east england. 12 celsius in the south—west. so the winds easing slowly on monday but then picking up again on monday night and into tuesday. the next area of low pressure driving in quite a broad band of rain, actually. this is going to be quite heavy. we are all going to get some soaking rain on tuesday and those winds will be particularly squally on that second band of rain. still on the mild side. perhaps temperatures in most parts of the country remaining in double figures. but behind that band of rain, there's a surge of colder air, coming down across the uk, with some showers around the middle part of the week, but there's more wet and windy and mild weather waiting to come in from the atlantic later on.

this is bbc news. the headlines: donald trump has thanked iran for what he described as very fair negotiations which led to a rare exchange of prisoners between the two countries. iran released an american phd student who had beenjailed for spying, a charge he denied. in return, the us freed an iranian scientist. it has being reported that a saudi air force trainee who shot dead three people at a military base in florida on friday posted comments critical of us involvement in foreign wars just hours before the shootings. the british heavyweight boxer anthony joshua has regained the titles he lost in a stunning upset in new york six months ago. in a rematch in saudi arabia, joshua won a unanimous points victory over the man who beat him injune, the mexican—american andy ruinr.