the world's most powerful leaders gather in argentina for the 620 summit. but it's clouded by tensions over trade, climate change, and the conflict in ukraine. we'll have the latest from our diplomatic correspondent in buenos aires. also this lunchtime. a 3.1% rise in railfares — unions and passengers say it's a kick in the teeth. most times i have to stand all the way to london bridge, and all the way back home. so, no, not happy. a mass data breach of the marriott hotel chain. the personal details of 500 million guests may be compromised. an air, land and sea search for this couple whose car was washed up on a scottish beach. and after years of campaigning for more black managers in english football, sol campbell says he's honoured to become one the colour of your skin, it's academic for me. it's all about working hard, knocking on doors and waiting for that opportunity. and coming up on bbc news...

manchester united's alexis sanchez faces a long time out with a hamstring injury suffered in training yesterday. his managerjose mourinho has revealed he was "screaming" in pain. good afternoon and welcome to the bbc news at one. the world's most powerful leaders are gathering at the 620 summit in argentina where they will grapple with issues including trade, security and global warming. but it's a summit marked by tensions and divisions among major powers, with the us and china locked in an escalating trade dispute, and western allies alarmed at russia's seizure of ukrainian ships. there's also tension with saudi arabia over the murder of the journalist jamal khashoggi. 0ur diplomatic correspondent james landale reports from buenos aires. these days, international summit

tend to focus on one man, what he says, what he tweets and what he does. this morning donald trump met his host, the president of argentina, and at least for now he was all charm. we have been friends for a long time, many years. he was a very young man, very handsome man. what the us president doesn't like is being part of a crowd. at this summit he is one of 20 world leaders are converging on buenos aires, all with their own agendas and plans for world affairs will stop theresa may is the first british prime minister ever to visit this city, taking a breakfrom ever to visit this city, taking a break from her brexit troubles but her focus was inevitably on persuading mps to support her deal back home. people voted for brexit andi back home. people voted for brexit and i think it's up to us to deliver brexit will stop the message i get from members of the public is they wa nt from members of the public is they want the government to do that. they wa nt want the government to do that. they want us to deliver brexit and we wa nt to want us to deliver brexit and we want to do it in a way that protects peoples jobs. the main issue at this

summit is donald trump's trade war with president xijinping of summit is donald trump's trade war with president xi jinping of china. they will meet for the first time since new tariffs were imposed on billions of pounds worth of goods but few expect a breakthrough here. president putin is likely to face tough questions over the russian seizure of ukraine's vessels. president trump said he would not meet the russian leader until the confrontation was resolved. and mohammad bin salman, the saudi prince is also in town looking to repair his reputation after the murder of thejournalist repair his reputation after the murder of the journalist jamal khashoggi. theresa may says she is looking for a full and transparent investigation. but for all the tensions, european leaders said it was important for the g20 to come together to tackle the worlds problems. no one country, no one region, can go it alone. during these g20 meetings, we are of the opinion there is no alternative to

multilateral cooperation. a trade war, naval confrontation, tensions with saudi arabia and the presence of donald trump. this is not a recipe for a smooth summit. the question is, what can these leaders find to agree on? james landale, bbc news, buenos aires. and the prime minister has been speaking to laura kuenssberg who joins me now. in argentina but with brexit on her mind. there is something strange about theresa may being here in south america, many thousands of miles away when what really matters for herfuture, leadership miles away when what really matters for her future, leadership and government is being able to peel off tory rebels who are really digging m, tory rebels who are really digging in, who are right now planning to vote against her brexit compromise in parliament in ii vote against her brexit compromise in parliament in 11 days' time. as it stands it would be a herculean

effort for number ten to be able to turn around that tide of political resista nce turn around that tide of political resistance and get the compromise through. we know that particularly tory brexiteers are furious and think she has negotiated a relationship that leaves us too closely tied to the eu for years to come. but as far as she is concerned, this is the best compromise and the only deal on the table. i asked compromise and the only deal on the table. iasked her today compromise and the only deal on the table. i asked her today what would happen if the vote falls the first time. would she be willing to have another go and she wouldn't rule out another go and she wouldn't rule out a second vote. i'm focused on the vote that is taking place on december 11. i want everyone who is going to participate, all members of parliament, to focus on what this vote does. you are not ruling out a second vote? i am focusing on the vote in two weeks' time. number ten knows they face a real struggle here. but right now theresa may, certainly in public, once no discussion and doesn't even want to

countenance the idea of being forced into a plan b. laura kuenssberg, our political editor, thank you. theresa may has just 11 days left to convince mps to back her. in the commons a week on tuesday. the odds appear to stacked against against her — christian fraser has been looking at the numbers. we don't know what will be in the minds of mps when they come to vote on theresa may's brexit deal. there will be five days of debate ahead of the vote, no end of warnings about the risk no deal might bring, and you just can't tell how many might duck the decision altogether and abstain. but right now everyone seems to agree that getting a commons majority is going to be an almighty struggle. so let's remind you of the numbers that we do know about in the house of commons. the conservative party has 315 mp5. not enough to command a majority. but in this parliament it has relied, of course, on the confidence and supply agreement with the dup, whose ten mps support the prime minister in key votes. over here, on the opposition

benches, labour has 257 mp5. the scottish national party has 35, the liberal democrats have 12, there are eight independents, four plaid cymru mps and the green party has one. that is a grand total of 317 mp5, but as we know, brexit has divided the two main parties. some mps won't do what their whips tell them. so let's look at who doesn't like the deal. first, there is the dup, all ten of them. they can't vote, they say, for a deal that includes the irish backstop, so let's put them in the no column for now. then there are the 80 brexit supporting conservatives who are on the record as opposing the deal, and also the tory remainers, who say they will rebel. there are at least 12 of them. so the total number of conservatives against this deal now stands, by our estimates, at 92. next comes labour and all the other opposition parties, and altogether

that could mean 312 votes against the prime minister. who's going to vote for the deal? well, the best estimate from bbc research is 225 conservatives will fall in behind her and one lib dem, which means on these calculations, the prime minister would be short by 95 votes. again, we don't know how many of this group might abstain, lowering this overall total. and we don't know how many labour mps might back the deal who haven't yet made a decision, but if the deal fails, it's important to note by what margin, because if it's big, the prime minister and her government may fall with it. there are some in number 10 who remain confident but right now this looks even harder than it was securing the deal in brussels in the first place. christian fraser reporting.

labour are backing a cross—party bid to try and stop the uk leaving the eu without a deal, if the prime minister's brexit plan is defeated in a parliamentary vote. let's get more now from our political correspondent, iain watson. so, iain, how significant is this support from labour? it could be very significant. do bear with me as i take you through some of the political manoeuvrings of this here at westminster. as you have been hearing, on 11th december theresa may will put forward her deal to parliament. but there are six alternative options, up to six alternative options will be allowed. labour will put forward their own plan for a customs union with the european union. it's unlikely to pass. so the labour mp hilary benn has a plan of his own, chair of the ci’oss has a plan of his own, chair of the cross brexit committee, he has been talking to other opposition parties like the snp, plaid cymru and the green party, so his option might have more support than the official

labour option. what it would do is in the event of theresa may's deal being voted down by mps, it would sate the option of no deal, leaving the eu with no deal at all, should be completely off the table. the labour leadership are getting behind this, partly to neutralise what they say is a very powerful theresa may attack, because she is trying to portray labour as a party of no deal to stop if you don't like her deal, you risk leaving the eu in a chaotic fashion. if parliament takes that no deal option off the table entirely then her political attack is therefore blunted. also some mps who would like to see another referendum, think taking the no deal option off the table might help them. but this would not be binding on government ministers. the hope is they would listen to the voice of mps but these days nothing is certain in westminster or in politics. political correspondent, iain watson. rail passengers and unions have reacted with outrage to news that

train fares are to rise by 3.1% in the new year. the rise comes after a year of timetable chaos, strikes, and delays on some parts of the network. about 40% of fares, including season tickets, will be affected. our business correspondent theo leggett reports. the cost of taking a train is going up. from january, the average price ofafairwill up. from january, the average price of a fair will increase by 3.1%. next year, a season ticket from manchester to leeds will increase from £3172 to 3272, an increase of £100. a london to brighton ticket will go up from £4696 to 4844, a rise of £148 was that many travellers at london bridge station today were distantly unimpressed. bit outraged, really. i expect there

will always be increases every year, but really they are not performing. most times i have to stand all the way to london bridge and all the way back home. so, no, i'm not happy. way to london bridge and all the way back home. so, no, i'm not happylj wouldn't mind paying an increase if they manage to get trains into the station on time and at the moment they are not. the annual increase in they are not. the annual increase in the price of rail tickets is one of the price of rail tickets is one of the less welcome winter traditions in britain. but this year travellers have particular reason to be angry. a timetabling fiasco and a succession of strikes have led to thousands of trains being cancelled 01’ thousands of trains being cancelled or delayed and made a lot of people very angry. that has led to calls for fa res very angry. that has led to calls for fares to be frozen. i think passengers are paying more than enough towards the cost of the railway and the government should look at the balance and keep pressure on the industry to reduce its costs and pass it on to passengers like a normal industry but the rail delivery group, representing train companies and network rail, says the extra money

is badly needed to cover rising costs a nd is badly needed to cover rising costs and fund new investment. nobody wants to pay extra for their fa res nobody wants to pay extra for their fares but what do the increases cover? the day to day running of the railways, allowing billions of extra money to be focused on investment. new stations, new carriages and extra services. the industry is promising major improvements to the railway network, allowing thousands of new services every week from 2021 and making travel more comfortable and making travel more comfortable and reliable. but that is likely to be cold comfort for passengers as they had to work injanuary faced with a new year of higher prices. theo leggett, bbc news. the marriott hotel chain says there's been a breach of its reservations database, potentially exposing information about 500 million guests. among the details accessed were passport numbers, payment card information, addresses and phone numbers. our personal finance correspondent simon gompertz is here. 500 million guests, it's a

staggering number of people. it's a big number. there might be some duplication in there, but basically this is because it's a huge group of hotels, thousands of hotels in hundreds of countries and many people passing through. the brand affected a re people passing through. the brand affected are not marriott, its others it owns, but big names like sheraton, westin, saint regis. they are globetrotter‘s hotels and they are globetrotter‘s hotels and they are the sort of personal details and ca rd are the sort of personal details and card numbers a hacker would love to get hold of. what they discovered in september is that someone had got access to their booking system and more recently they have found that in 327 million cases, that's personal details, passport numbers and e—mail addresses. but in some of them, they haven't been able to tell us them, they haven't been able to tell us how many yet include payment card numbers, which are encrypted, but stolen, possibly, the key is needed to get through the encryption. so

it's a huge embarrassment for marriott hotels stop they have said sorry and have put out advice for people on what to do, but they can't look back at what happened and stop it. it is anyone from 2014 till the middle of september, he might have used one of those hotels. ukraine is banning russian men aged between 16 and 60 from entering the country. it comes amid rising tension between the two countries, after russia seized three ukrainian naval vessels off the coast of crimea. ukraine has already declared martial law, and it's now banning russian men of fighting age to prevent what it calls the formation of "private armies." richard lister reports. another day of exercises for these ukrainian troops amid growing fears ofa ukrainian troops amid growing fears of a russian invasion. kiev has already imposed martial law in these border regions. now the ukraine president has banned russian men of fighting age from crossing into the country. translation: these measures

are to block the russian federation from forming private armies here under the leadership of the russian armed forces and to prevent them from carrying out operations like those we saw in 2014. when russia annexed ukraine's crimean peninsula four years ago, it was these russian militia men in unmarked fatigues who led the way. they quickly took over the airport and other key sites. ukraine sees last week's clashes in the kerch strait when russia seized three ukrainian vessels and their crews is the first steps to another russian land grab. but moscow accuses kyiv of overreacting. translation: i think it would be very scary if anyone tried to mirror the decisions taken in ukraine. this would be madness. what has happened there is the result of a dysfunctional government. kiev wants nato to patrol this stretch of water between russia and ukraine to stop ukraine's allies are wary of

inflaming tensions further but the eu has signalled today that it is likely to extend sanctions against russia later this month. richard lister, bbc news. the time is 17 minutes past one. our top story this lunchtime. the world's most powerful leaders gather in argentina for the g20 summit. but it's clouded by tensions over trade, climate change, and the conflict in ukraine. and still to come: thousands of people are to be prescribed a new ultra—low calorie diet that can reverse type 2 diabetes. coming up on bbc news: tyson fury and deontay wilder have been warned any repeat of this at their weigh—in later could mean they lose their purse ahead of sunday mornings heavyweight showdown in la. there are less than two weeks to go before the crucial vote on the prime minister's brexit deal in parliament. for many coastal communities one of the most important issues is fishing rights.

one key reason some voted leave in the referendum was the eu's common fisheries policy — which restricts how much british fishermen can catch and allows boats from other eu countries to fish in british waters. john maguire has been to western cornwall to find out what people there make of theresa may's plans for brexit. what these boats can and, crucially, can't catch has been controlled by europe for almost 50 years. and the chance for british trawler men to leave the common fisheries policy has been seized upon here in newlyn. it may not be the biggest industry in terms of economy and money but it's certainly right up there in terms of iconic status, a real litmus test of brexit. can we really take back control? let's see with fishing. along the coast in penzance, this is the bit in the tv report where we talk about tempestuous times and uncharted waters. cornwall voted leave with a 56%

share two and a half years ago. but what do people here think of the negotiations now? they are in a mess. no plan b is a major, major problem. but you want to leave? yeah. and what of the 43% who wanted to remain? brexit‘s the hot topic in pubs, kitchens and front rooms across the uk. there's so many in poverty that even the un are wagging their finger at us. so, to push us further backjust seems absolute madness. whenever a fishing boat goes out to sea the skipper‘s never quite sure what they're going to catch, what they're going to be able to bring back and land on the quayside. uncertainty. it's a word you hear here time and time again. people are really fed up with not knowing what's going on. and for the countys crucial tourism sector, uncertain times are not welcome. i'm a bit worried sometimes that the language can get a bit

edging towards being a bit too nationalistic and not about a political dispute. we want people to come and enjoy it, not only from britain, also from abroad, and enjoy this beautiful part of the world. if the pm came to penzance, she would need to convince everyone from fishing, farming and business, that she has the answers. until we have a deal, whether it's this deal or any other deal, we have to plan for no deal. and so at the moment we are already pressing go. giving us a deal on march 28th is not good enough. we are spending money right now. it takes time to stockpile. it takes time to find warehouse space. and all those things are now coming at a premium. so, the clock is ticking. days before mp's vote and maybe, just maybe, deliver some certainty in an uncertain world. john maguire, bbc news, west cornwall. thousands of people in england are to be prescribed

an ultra—low calorie, liquid—only diet after initial trials showed it can reverse type 2 diabetes in people who've recently been diagnosed. nhs england says the diet will be used alongside an expanded programme that focuses on prevention. here's our health correspondent, dominic hughes. it's about cutting down. you know, small steps... at a community centre in leeds, the battle against diabetes is under way. reducing portion sizes and how frequent you have these naughty foods and all that... all the people here were on the cusp of developing type 2 diabetes. now they've been helped to lose a bit of weight and think about what they're eating. everybody should be educated about how we eat, what we eat, why we eat, and when we eat. i've lost so much weight. i feel better, i feel happier. an estimated 12.3 million people in the uk are at risk of developing type 2 diabetes.

a quarter of a million people in england have already been referred to the special prevention programme, like the one running in leeds. on average, they've lost nearly 4kg, so now the scheme is being extended. weight loss is all well and good, and we're delighted with the weight—loss trajectories that we've seen in participants on the programme. of course, what counts at the end of the day is whether we are preventing type 2 diabetes from arising. that takes a little longer. and a new pilot scheme will help those who have already developed type 2 diabetes. it will build on a recent trial of a very low—calorie diet using liquid meals and helped almost half of those involved to reverse the condition. a combination of diet and exercise helped labour's deputy leader tom watson shed seven stone and put his type diabetes into remission. i did it because i didn't want to die.

i wanted to live. i've got young kids. so i did it to live for my children, really. and that was me finding my own way of doing it and that is what i would say to people, you need to do this for yourselves. poor diet and weight gain is driving the growth and type 2 diabetes. the number living with the condition in the uk is approaching 4 million. it is a health crisis that campaigners say is beginning to be addressed. we need to take really, really rapid action and this is why we at diabetes uk are delighted that nhs england has made this announcement today, notjust to think about prevention but also for those living with type 2 diabetes now, to think about the potential for them to put it into remission. improving the health of patients and saving the nhs money, the fight against the type 2 diabetes epidemic has just been stepped up. dominic hughes, bbc news. police in south west scotland are searching for a couple whose car was found washed up on a remote beach after flooding in the area. the vehicle belonging tojim and susan kenneavy was discovered by workmen clearing debris

from a flooded coastal road beside drummore beach in dumfries and galloway. our correspondent katie hunter is in drummore. what's the latest on the search katie? there is a very intense search going on here this lunchtime, in the last couple of hours we have seen the coastguard helicopter flying overhead, lifeguard teams out searching and dozens of people scouring the shoreline here. police say they are very worried about james and susan, the couple have not been seen since wednesday afternoon. their car was found washed up on a beach not far from their car was found washed up on a beach not farfrom here their car was found washed up on a beach not far from here at 730 yesterday morning. it's a lovely day here today albeit a bit windy, on wednesday it was a different story. iam wednesday it was a different story. i am told waves between 20—30 feet we re i am told waves between 20—30 feet were lashing the coastal road behind me. there are about 30 people involved in the search at the moment, they probably have only got

a few more hours of daylight left. i am told the search is expected to continue until daylight fades and possibly beyond but the longer the search goes on, of course the more concern grows forjames and susan. but emergency services are clean to emphasise this is still very much a search and rescue operation. thank you, katie hunter in drummore. british researchers have come up with a way of predicting when there could be swarms of insects that would devastate crops in africa. using satellite data gathered by the uk space agency, the system combines temperature data and weather forecasts with computer models. it's hoped that the early warning system will boost the yields of poor farmers and increase their incomes. our science correspondent, pallab ghosh reports. george is a plant doctor. today he's making his fortnightly visit to a small town in kenya's rift valley province. he treats crops ravaged by pests. this farmers maize has been infested by tiny caterpillars.

with the help of an app, he identifies the species and recommends the right pesticide, and other measures. due to the increased income in my farm, my kids can now go to better school because of the consistent income i am getting from the farm input — output, sorry. also livlihood has improved in my farm, home, because i can see, i can meet the basic needs for my family. a world away at a powerful supercomputer data centre in oxfordshire, the uk space agency is trying to make life for walter and other subsistence farmers even better. the plan is to use satellite data to develop a system that is able to predict pest infestations a week or more in advance. this map shows the land temperature, one of the major factors that drive infestations. the system combines that with weather and other local data.

the plant doctor scheme has been incredibly successful. it's helped 18.3 million farmers all across the world. and on average their incomes and yields have increased by 13%. it's hoped the new predictive system could do even better, boosting that figure to maybe up to 20%. farmers are completely dependent on crops, the predictability of having a good yield to survive, but also to send their kids to school. so if we can reduce the impact of pests, if we can enable them to get better yields, which is what we are already seeing, it will mean that they can help move out of poverty. farmers such as lillian wanyama now get alerts when the insects are coming and can take precautions before they arrived. the money she and others like her save, and the extra food they produce, will make a big difference to them and their communities.

pallab ghosh, bbc news. the former england footballer sol campbell says he's honoured to get his firstjob as a manager — at macclesfield town. campbell has been a vocal critic of the lack of black managers in football — currently there are only seven other ethnic minority managers across the 92 football league clubs. david ornstein reports. sol campbell made his name at the top of the game. as a manager, he's starting at the bottom. campbell is just the latest star of his generation of footballers to take a seat in the dugout, but the journey to get there hasn't been easy. it would be at least 12, 15 applications. i know a lot of players out there, who want to be managers, are having difficulties at getting a job as well. so my situation is not unique. chanting: sol campbell, judas! campbell's controversial move from tottenham to arsenal

was vindicated with a succession of trophies, including two premier league titles and fa cups. he also represented england at six major tournaments. but later claimed he was overlooked for the captaincy because he's black. i still believe that i was the wrong colour. i think if i was white, i think definitely my chances of being captain would have been enhanced. it's estimated that 25—30% of professional footballers in england come from black, asian and minority ethnic backgrounds. however, that's not replicated among managers. across the 92 league clubs, sol campbell has become only the eighth of bame origin. delighted to see another black manager going into a very difficultjob. and of course it's more about the individual. and sol taking that role. campbell is seen by some as a complex character.

while contemporaries like frank lampard and steven gerrard have gone straight into high profile management positions, campbell takes over at macclesfield with the club rooted to the foot of league 2. i think for me, the colour of your skin, it's... it's academic for me. it's all about working hard, knocking on doors and waiting for that opportunity. while his task may be daunting, but at least campbell now has his chance. david ornstein, bbc news, macclesfield. time for a look at the weather. here's helen willetts. it's been one of those weeks, so much rain and wind and more to come for some of us this weekend, at the moment a bit quieter, this came from gwyneth, beautiful rainbow because we have showers around, we've also had beautiful sunny