good afternoon. snow and ice have caused another night of disruption for parts of the uk. in kent, police reported answering hundreds of emergency calls and work to re—open the m3 near basingstoke in hampshire continued into the early hours of this morning. forecasters are warning of more severe weather over the weekend with the possibility of temperatures dropping to minus 16 degrees celsius in parts of scotland overnight. caroline davies reports. stuck fast in the snow in basingstoke. after hours of disruption, cars and lorries were eventually freed and the snow is starting to ease. yesterday's conditions didn't stop money heading out on the main roads today, including those who do it for a living. the congestion it causes, you can't get on with yourjob, sometimes. you know, just deal with it and get on with it. i came down from the midlands and there was

nothing at all up there. further south i've come, the roads are a little bit icy. probably about the la st little bit icy. probably about the last hour i would say i've been amongst the snow. where are you on to, next? down to amesbury, iwill be amongst it for the next hour or so. be amongst it for the next hour or so. it's not been too bad. the worst but i found is actually the car park here because it hasn't been gritted at all. but most of the roads seem to be ok. conditions in most parts of the uk have tended to be better today than they were yesterday. and with sunshine and clear skies, the snow is starting to melt, which has meant that some people who were stuck have been able to start to go home. it wasn't easy for all truck drivers, in keith, this lorry found itself in need of help from highway services. but snow hasn't been miserable for everyone. in haslemere, this morning, some strapped on their skis and enjoyed the powdery slopes. caroline is in chieveley in berkshire for us now — how are conditions at the moment? in hampshire, which we heard about

in that particular piece, we heard conditions have improved, or at least we had from the police said that road is now clear and the traffic is now flowing freely. i am in berkshire. the sun is out and the snow has generally settled. conditions are quieter, i am not standing ina conditions are quieter, i am not standing in a blizzard. that is the case across the uk. notjust sunshine in berkshire but plenty of drivers. most that we spoke to had generally said the conditions had been 0k generally said the conditions had been ok so far. however, we are about to have a very cold night. here in berkshire, we heard it could get down to —12 and the concern is that this snow, which is gradually turning to slush, will then freeze overnight and for mice. that means there is a yellow weather warning in place until tomorrow morning —— back and turn into ice. the concern is, particularly if you are out driving and on roads that haven't been

treated by gritters, the main roads are —— make they are focused on. you should be particularly careful. thank you very much. russia has suspended its participation in a key nuclear arms control agreement, after the united states announced yesterday that it would do the same. the us and other nato countries say russia has violated the intermediate—range nuclear forces treaty — an accusation russia refutes. our correspondent steve rosenberg is in moscow. what are the potential consequences of this tit—for—tat between russia and the united states? well, this isn't a surprise but it is significant because the inf treaty was one of the cornerstones of east— west arms control that helps to bring an end to the cold war. now what do we see? america has suspended its participation in the inf treaty and now russia has suspended its participation in this treaty. washington and moscow accusing each other of having violated that treaty. although president putin today made it clear

he doesn't want russia being dragged into a costly new arms race, and he said that russia's doors remain open to america, to discuss these issues, he also spoke of the new weapons that moscow intends to develop, because of this situation. new short at medium range hypersonic weapons, new cruise missiles, land—based. it feels as if east and west are moving closer to a new cold war. steve rosenberg in moscow, thank you. a look now at some of the day's other news stories: social media companies should ban celebrity—endorsed online ads, which promote products said to help weight loss, according to the medical director of nhs england. professor stephen powis says the products have a damaging effect on the physical and mental health of young people. some celebrities, with large numbers of followers on social media, promote products such as diet pills and detox tea. the government has drawn up plans to replace the ce safety symbol on products in the event of a no—deal brexit, the bbc has learned. the mark belongs to the european union, so if britain leaves the eu without a deal,

goods will have to be stamped with a new symbol — ukca. many household items such as kettles, light bulbs and toys currently display the letters ce to show they comply with safety regulations. monsoon rains have triggered severe flooding in queensland in the north—east of australia. floodwaters turned streets into rivers, sweeping away cars and livestock and inundating homes. hundreds have been flooded and the army has been drafted in to help with the emergency. more rain is forecast in the coming days. pupils should be banned from taking smartphones into classrooms, according england's schools minister. the government is due to publish new guidance shortly on issues such as internet safety and social media. but some teachers say mobile phones can be "fa ntastically useful" for learning. our political correspondent, jessica parker, has more. smartphones are everywhere. but should they be in schools? well, it's the responsibility of head teachers to decide. but the ministerfor

school standards, nick gibb, says it's his own view that schools should ban their pupils from bringing smartphones into school. i have to agree with that, because they have them so often in their hands that they won't be concentrating or listening properly. they can use them for other things in school, that's the only thing. like calculators and things like that on them. but they don't use them for that, do they? they are just using them personally allthe time, one imagines. they certainly shouldn't be allowed to have them on, when they're at school. perhaps to and from school, yes. but certainly not in school time. the government's due to publish new guidance for schools shortly and it's expected to say children should be taught to limit the amount of time they spend on the internet. mr gibb says while there is nothing intrinsically damaging about spending time online, excessive use can leave children tired and unable to concentrate. managing our smartphone use is a challenge facing adults as well as children. but there are those who argue restricting access in this way isn't the answer, because young people need to be able to fully engage with this kind of technology.

if you push phone use away from school and ban it, you arejust pushing it underground and you are losing an opportunity to help young people learn how to use tech for good and to use their mobile as part of their working and living life. and the trade union, the naht, which represents school leaders, has also expressed scepticism, saying there isn't one policy that will work for all schools. jessica parker, bbc news. with all the sport now, here's mike bushell at the bbc sport centre. good afternoon. we are less than an hour away from the second six nations match of the season, and they have a lot to live up to in edinburgh, after wales' dramatic win in paris. first up today, it's scotland, the strrong favourites against italy, who once again are tipped to be the bottom team come mid march. only time we play at murrayfield,

there is pressure for the team to perform —— any time. we always respect the opposition and we do, with italy, the last game we played against them, we probably should have been beaten but it away comes back to us as a team. almost we can't worry about who's coming here, it is up to us to hold our standards. we are confident we can ta ke standards. we are confident we can take anybody on here at home. that one is live on bbc one, and then at 5:30pm, ireland the defending champions, host england in dublin. ireland are the once again the team to beat, while england have something to prove if they are genuine world cup contenders later this year. when you get a really tight game like this, you will need little slices of luck. both teams will prepare to make sure you are in the right place, physically and mentally, to implement your game plan. implement your little plays, phase plays. a little bouncers of the ball will come. that is how you can be in the right place at the right time to seize the opportunities. both teams will meet a slice of that. these are the sort of games you

realise you are privileged to play in them. you know, full house, big start to a campaign against a top quality team. we will realise we are extremely fortunate to be in this position. like i said, we will get ourselves mentally switched on for this game. onto football. in the days early premier league kick off, tottenham are hosting newcastle. it's goalless approaching half time. after 39 minutes. newcastle's new signing miguel almiron missed a glorious chance to give them the lead. it was his debut. tom daley took a complete breakfrom diving last year, after injuries and illness left him physically and emotionally exhausted". during that time, he became a father, but despite a few sleepless nights he says he s feeling "fitter than ever". nick hope has been to meet daley ahead of his return to action in plymouth, today. tom daley has experienced more in the last decade than many do in a lifetime. but he sees 2018 as his most dramatic year to date. started off with pneumonia, then i got something

similarto, like, a glandularfever. and then i was still trying to dive and i ended up with some concussions, but still managed to go to the commonwealth games. but, after that, body and mind needed time to rest, especially with the impending parenthood. baby robbie, named after daley‘s late father, rob, arrived injune and the diver simply loves being a dad. it has been the most amazing thing. i'm able to come home from training, whether i have a good day or bad day. i willjust have that unconditional love and excitement when he sees me coming through the door. what is he like? tell us about his character. oh, my goodness. he is like a cheeky little monkey, to be honest. he grows up so quickly. i remember, it was only yesterday when i wasjust holding him and he felt like this big, and now, like, you struggle to carry him, he is so big. we haven't seen robbie. in social media posts, you made a point of not showing his face. tell us a little bit about how you came to that decision. he doesn't necessarily have the choice of whether he wants to be on social media or not, and wwanted to keep it for our family and for us. in the future, that might change.

he will be coming to watch and there's not going to be anything stopping people taking photos. right now, we want to do everything we can to protect him. having his son, robbi,e watch on won't be the only new experience having his son, robbie, watch on won't be the only new experience for tom daley this weekend, who is also preparing with his new synchro partner, matty lee, for the first time. he is feeling so positive about their potential, as well as parenthood, that he is actually considering extending his career beyond the next olympics, tokyo 2020. i thought i was coming to the end of my career, last year, with my injury and illnesses. i thought i wasn't going to be able to do it. now, i'm stronger, fitter, healthier in both mind and body than i have ever been in my whole career, so i am really excited with what's to come. great to see him back and a new dad as well. that's all the sport for now. you can see more on all of today's stories on the bbc news channel. the next news on bbc one is at 6:25pm, bye for now. hello.

you're watching the bbc news channel with shaun ley. dramatic footage has emerged of the moment a dam burst in brazil, releasing millions of tonnes of mining waste that engulfed nearby buildings. at least 110 people are now known to have died in the disaster, hundreds are missing. our science editor, david shukman, reports from the site of the dam in the state of minas gerais. this is pretty well as close as we are allowed to get to the disaster site. you've got some local people here just trying to come to terms with what on earth happened, so let me try to explain to you how this disaster unfolded. up in the hills beyond, that's where the dam itself was, holding back a great lake of sludge. it broke, as we know, and a torrent of heavy cement—like mud tore its way down one of these valleys just in the distance there, overwhelmed the cafeteria, where miners were having lunch,

overwhelmed the offices of the mining company itself. then it swept into this area where we are now. right in the middle of this little area was a posada, a kind of small hotel with holiday chalets. that was all swamped by the mud. just close by here — this was basically a farming area, a little farmhouse, just absolutely wrecked by the power of the deluge of mud. what happened next is that the mud didn't just stay here, it was moving incredibly rapidly. you can still hear the search and rescue helicopters buzzing around and occasionally we see rescue teams still at work. i say rescue — they are now in the business ofjust searching for bodies. one team we sawjust now had a dog with them. they were trying to respond to wherever the dog was sniffing. the wall of mud destroyed this whole

area and then carried on over the ridge you can see in the distance, and into a valley beyond, where it then tore through a village down below, causing yet more destruction. the question that everybody is just bewildered by, stunned by here, is how brazil, which is a rapidly industrialising, modern economy, how here this kind of disaster, whatever failings there were in safeguarding the dam were allowed to happen, caused so many deaths and so much destruction. as we've been hearing, russian president vladimir putin has said that russia is withdrawing from the cold war—era intermediate—range nuclear forces treaty after a similar move by the united states. president putin insisted the door remained open for negotiations, but he instructed ministers not to initiate arms control talks. i'm joined now by professorjohn russell,

emeritus professor of russian and security studies at the university of bradford. it has been described as unsurprising that russia should respond in this way. what do you make first of all of the initial decision of the americans to suspend their involvement in the treaty?” think it goes back to a largely forgotten speech putin made last year which was a couple of days before the sergei skripal affair broke when he announced the new programme of building cruise missiles that could not be detected by any antiballistic missile system and those drones that were going to be housed under the poles which could be launched worldwide which

caused the western nato in particular to reconsider strategy because of the inf treaty. russia's response predictable, but what does it mean? it is predictable in so far as putin has said since 2007 the inf no longer serves russia's national interest. the main concern russia has is since the usa withdrew from the treaty in 2001, they are potentially going to be ringed by antiballistic missile installations, about 400, around russia, which could of course be adapted to how is offensive weapons. this is something the russians fear greatly —— empty ballistic missile installations.”

wa nt ballistic missile installations.” want it if repudiating if that is what happens, this treaty, might have been inevitable but also might be an opportunity to engage more countries that are currently nuclear powers that were not thought of seriously at the time the measures we re seriously at the time the measures were drawn up? notjust new countries particularly china but also new weapons. drones did not exist, military drones, in 1987. i think the main difference u nfortu nately between 1987 think the main difference unfortunately between 1987 and now is that you had gorbachev on the soviet side and arguably he was the last world politicians that actually put humanity interests over his national interests, and that ended badly for him and his country. i think president putin is not the same position and would not be likely to surrender russia's national interest for the sake of all of us, if you like, which is a

nuclear free world. what you make of the nato secretary general‘s interview in which he pretty much endorsed donald trump ‘s decision to suspend involvement this treaty. that will inevitably happen within nato. there is a dilemma within nato because the 1987 treaty, which i am old enough to remember the run—up to that cover made western europe safe. nowadays, i do not think there is a genuine threat to felt in germany, france and great britain of an imminent attack, nuclear attack by russia. the countries where they are very aware of the severity of this are on the borders of the old soviet union, including the baltic states, which were within the soviet union, countries like poland and romania, which not only are advocating a hard line against russia, but are willing

to be basis for the missile systems the united states is keen to put in place. professorjohn russell, thank you. plans to prevent censorship during debates at universities have been drawn up following a number of incidents where speakers were banned from campuses. the guidelines, which are designed to encourage open debate unless there's been a breach of the law, have been drawn up by the equality and human rights commission, together with students and universities. joining me now is the human rights and freedom of speech campaigner peter tatchell. thanks for coming in to talk about this. what do you make of the idea of having these guidelines?” this. what do you make of the idea of having these guidelines? i think the guidelines strike the right balance and say university authorities and student societies have a legal duty to uphold free speech, even when that speech may cause offence, may be disturbing, perhaps shocking, the only caveat they add is when the speech is not

lawful, such as inciting violence. they say if people object to a speaker's views, the best way to deal with it is by counter argument and peaceful protest. have you been concerned, because you are never shy ofa concerned, because you are never shy of a lively debate and indeed protesting against speakers. you are not a believer in banning speakers. have you been surprised by how the debate seemed to gain currency which presumably is part of the reason the guidelines are published? there has been publicised examples of speakers being blocked or shouted down and that has led to a general view that free speech is under attack in uk universities. i think it is in some universities, but relatively small. the parliamentaryjoint universities, but relatively small. the parliamentary joint committee universities, but relatively small. the parliamentaryjoint committee on human rights and the bbc‘s own freedom of information sources established that the number of incidents are quite small and it is

not as bad as portrayed by some and is somewhat exaggerated. we need to be mindful there are instances and exa m ples be mindful there are instances and examples where student unions have gone too far but that is not the general trend. i think this report is reiterating the importance of free speech and giving i suppose helpful advice to universities and student unions, these are the legal requirements. it is the specific exa m ples requirements. it is the specific examples that reveal what people's attitudes are. it is difficult presumably for universities who have a duty of care to students and of the student says, i am made to feel uncomfortable by the presence of this person, in a shared space i occu py this person, in a shared space i occupy as a student, it is hard to refute that in some cases. there can be strong feelings, such as an homophobic speaker and maybe an

islamist speaker who wants the death penalty for homosexual is. many would find that offensive but that is the sort of speaker presumably you would say argue against them, do not shy away. in my view there are three examples where free speech can be limited legitimately, first when someone makes damaging allegations that are false, accusing someone of being a rapist, a fraudster. and when they engage in harassment. third, if they incite violence. in all those examples, it undermines free speech because it intimidates people who do not feel able to respond. but otherwise the best way to deal with bigoted ideas is by subjecting them to scrutiny and have a counter speaker and protests, to show those views and ideas do not have substance or basis or evidence, and why they are wrong. that is how you change things. if you go down

the route of censorship, the ideas do not go away, they'lljust suppress. reviewing gauge, things can change. a good example was the bbc‘s question time when nick griffin was invited to speak. a lot of people knowing him as far right extremist leader did not want him on the bbc but ironically, perhaps it was the best thing because the other panellists tore to pieces. he emerged from the programme discredited and that was the beginning of the demise of the british national party. you could say open scrutiny is more effective than censorship in many cases. do you think perhaps student unions go for provocative speakers because they know they will get a good audience and they will get some publicity and stir up controversy? that is rare. it may happen sometimes but student unions basically, they want to have robust debate. most facilitated. there are

insta nces debate. most facilitated. there are instances like the iranian feminist who was shouted down. there were attem pts who was shouted down. there were atte m pts to who was shouted down. there were attempts to ban herfrom some universities because she was critical of far right islamist extremism. she is not against muslim people, she is a defender of muslim people. i yet some muslim people we re people. i yet some muslim people were offended. do you say if you are offended it is not a reason to prevent people expressing views? offended it is not a reason to prevent people expressing views7m the end, to their credit, universities and student unions allowed her to speak. it shows there isa allowed her to speak. it shows there is a contest going on about elements of free speech and these guidelines area of free speech and these guidelines are a useful parameter. thank you. norway is on a drive to cut down on the amount of food that is left uneaten on plates in hotels and restaurants. and, as our environment analyst roger harrabin reports from tromso, they are also hitting on some cunning ruses to persuade us to take less, and eat less.

in a restaurant, there's always food thrown away. this hotel in tromso is trying to halve its food waste, but how? let's start with these smoothie shots. these are made from yesterday's leftover fruit. then crafty tricks to nudge people into taking less, like skinny tweezers to stop you piling up the salmon, or little spoons to serve the herring. and look at this — a micro muesli. how cute is that? another idea — instead of guests taking a big melon slice and leaving some, the staff dice it so you take precisely what you want. and in case you missed the message... many people load onto their plates, so they don't have to go multiple times. we were able to make people think about how they put food on their plate and how much they bring to the table to make sure they eat it all. another trick is to keep

food looking fresh. as a serving dish empties, guests assume the remains are stale, so why not switch the food into a smaller dish? then again — so it still looks fresh and all gets eaten. ideas like this have cut food waste almost 10% in a yearfor this chain. the target is 20% by 2020 and then 50% by 2030, the same as the un target. the chef weighs the daily waste. so far, the policy has saved the hotel chain 26 tonnes of carbon dioxide emissions. and there's a bonus. we're also making money out of it, which is a really positive side—effect by reducing food waste. so how do guests respond to this culinary nanny state? if i have tools given to me that i take less, then it helps me. i don't put on as much weight when i travel. i think it's a good thing. i feel it helps the environment, but it also helps myself to not

gain — what do i call it, weight that i don't need. there is no ban on loading up your plate here. take as much as you want. but you'd better not leave it. roger harrabin, bbc news, norway. time for a look at the weather with mel coles. good afternoon. how was it looking? it is going to get quite cold in some areas tonight. the wintry weather is in no rush to change but there are signs of something more mild in the coming week but we are not quite there. further wintry showers feeding in across the east coast and north—west scotland. away from that plenty of crisp winter sunshine but it feels cold and the northerly wind is not helping out temperatures. where we saw snow melts we have had wintry showers by day and are at risk of

icy stretches at night. temperatures are going to plummet and we expect a sharp frost and where we have lying snow in southern england, temperatures could dip as low as —12 celsius, which would be the coldest of the winter so far. we look to the west through the morning with a cold start and cloud and rain and snow, even to lower levels, working eastwards into north—west england and scotland. as the day goes on, the snow will be confined to higher ground. hello this is bbc news with shaun ley. the headlines: yellow weather warnings for ice have been issued for this afternoon and tonight in eastern and southern england. the met office is advising care. russian president vladimir putin has said that russia will no longer comply with a nuclear weapons treaty, a day after the united states said it was withdrawing from the agreement. england's minister for schools says pupils should be banned from taking smartphones into school.

plans to prevent censorship during debates at universities have been drawn up following a number of incidents where speakers were banned from campuses. heavy rain has caused severe flooding in north—eastern australia. dozens of homes have been flooded, and the army has been drafted in to help.