but if a cell in a faulty battery heats up uncontrollably, this can happen — thermal runaway, demonstrated here in a lab. the owner of this electric bike was lucky to escape unharmed. in cambridge, last summer, gemma germeney and her children, lilly and oliver died in a fire caused by a faulty e—bike battery. her partner, scott, was badly burned, but managed to escape the blaze. i screamed, "gemma, the kids, pass me the kids." and i heard a voice from her saying, "i can't get out." as well as tougher enforcement of quality control and safety standards, the petition is also calling for clearer guidance on safe handling and potential dangers. this could be preventable. if people knew the dangers,

they wouldn't leave the bike at the entrance, blocking the exit so people can't get out. that's exactly what happened with sofia. last year in london, the number of fires involving e—bikes and e—scooters went up by 60% compared to the year before. there was a fire on average every two days. have you been surprised by how many people have signed this petition? yeah, very. almost 32,000 in five and a half weeks. 100,000 people. it's what is required to be taking into the parliament. do something. prevent this death. make sure that she didn't die in vain. researchers in canada say they've discovered that sperm whales live in human—like clans, with distinctive cultures, and even dialects. the scientists used underwater microphones and drones, to examine the sounds and behaviour of the animals, asjon donnison explains.

the clicks and clacks of a sperm whale. and as you might expect from the creature with the biggest brain on the planet, their chit—chat has more to it than meets the ear. this latest research, published in the royal society open science journal, found there are at least seven separate clans of sperm whales in the pacific ocean, each with its own distinct culture and vocal dialect. well, the sperm whale sounds very simple. their patterns of clicks are a bit like morse code. the two clans we discovered this on, one sounds, click, click, click, click. and the other sounds, click, click, click... ..click. the study also showed the whales use their distinct dialects to communicate and make democratic, consensual decisions about where to go. one example saw them take an hour

and a half to decide whether or not to make a 90 degree turn, in what the researchers called a slow and messy process. jon donnison, bbc news. british army officer preet chandi, has been nicknamed �*polar preet�*, for her record—breaking antarctic treks. well she's just returned from her latest epic challenge, setting off from the hercules inlet and skiing more than 700 miles to the south pole. it took her just 31 days, and she's now believed to be the world's fastest woman to ski the route solo, as charlotte winfield reports. captain preet chandi, the british army medic who keeps making history. she's been hailed by royalty... i know! i remember chatting about it! ..appointed an mba, broken two world records. and if that wasn't enough... ..now she's done it again.

we think. the world record has to be officially confirmed.

i got the record, 80 days. but it's believed polar preet is now the world's fastest woman ever to reach the south pole. my battery died! pulling a i2—stone sledge with everything she needed to survive and battling temperatures of —30 degrees celsius, there were highs... it's actually going all right so far, moving quite well and i'm actually sleeping well, as well. ..and lows. not a great day today. but focusing on the next day. she had to ski for up to 13 hours a day and whatever the weather, preet kept going. skiing is hard. a month later, her determination paid off. the finnish flag was finally in sight and so was her favorite

drink. i've got a little parcel here. i've just made it to the south pole. wonder what it could be. preet�*s goal is to show people you can do anything. so as for what's next on her list? the sky's the limit. charlotte winfield, bbc news. quite incredible. and as awards season gets into full swing, dark comedy, poor things has aleready picked up several big trophies. the film sees emma stone play an adventurous and very uninhibited woman, and opens here in the uk on friday. the picture won for best comedy film at the golden globes, and stone won for best actress in a comedy or musical. tom brook has been speaking to cast members mark ruffalo and willem dafoe, who've also been picking up accolades in film that seems very much oscars bound. award season has most definitely

ticked off. dark comic satire starring emma stone has been getting plenty of recognition, winning the golden globe for best comedy picture. golden globe for best comedy icture. , ., ., ,., , golden globe for best comedy icture. , ., ., , ., picture. her brain and her body are not uuite picture. her brain and her body are not quite synchronised... - picture. her brain and her body are not quite synchronised... this - not quite synchronised... this victorian _ not quite synchronised... this victorian area _ not quite synchronised... this victorian area frankenstein inspired tale has emma stone as a star, a woman brought back to life by a strange surgeon who has given her the brain of a dead foetus. so now she has no filter, she says what is on her mind. fin she has no filter, she says what is on her mind-— on her mind. on your sad face, makes me discover— on her mind. on your sad face, makes me discover angry _ on her mind. on your sad face, makes me discover angry feelings _ on her mind. on your sad face, makes me discover angry feelings for - on her mind. on your sad face, makes me discover angry feelings for you. i me discover angry feelings for you. she is_ me discover angry feelings for you. she is accompanied on a european adventure by mark ruffalo. the actors like how the film throws light on social repression. you look at the character _ light on social repression. you look at the character of _ light on social repression. you look at the character of emma _ light on social repression. you look at the character of emma and - light on social repression. you look at the character of emma and she i

light on social repression. you look| at the character of emma and she is this wise _ at the character of emma and she is this wise innocent. _ at the character of emma and she is this wise innocent. you _ at the character of emma and she is this wise innocent. you have - this wise innocent. you have the setup _ this wise innocent. you have the setup of— this wise innocent. you have the setup of the _ this wise innocent. you have the setup of the reanimation - this wise innocent. you have the setup of the reanimation and - this wise innocent. you have the i setup of the reanimation and then she goes— setup of the reanimation and then she goes out— setup of the reanimation and then she goes out of— setup of the reanimation and then she goes out of the _ setup of the reanimation and then she goes out of the world - setup of the reanimation and then she goes out of the world and - setup of the reanimation and then she goes out of the world and shej she goes out of the world and she basically— she goes out of the world and she basically is — she goes out of the world and she basically is a _ she goes out of the world and she basically is a truth _ she goes out of the world and she basically is a truth speaker. - she goes out of the world and she basically is a truth speaker. she l basically is a truth speaker. she sees _ basically is a truth speaker. she sees everything, _ basically is a truth speaker. she sees everything, she _ basically is a truth speaker. she sees everything, she sees- basically is a truth speaker. she sees everything, she sees the l sees everything, she sees the repression, _ sees everything, she sees the repression, social— sees everything, she sees the| repression, social conditioning sees everything, she sees the - repression, social conditioning she sees the _ repression, social conditioning she sees the things _ repression, social conditioning she sees the things that _ repression, social conditioning she sees the things that force - repression, social conditioning she sees the things that force us - repression, social conditioning she sees the things that force us to - sees the things that force us to connect — sees the things that force us to connect with _ sees the things that force us to connect with who _ sees the things that force us to connect with who we _ sees the things that force us to connect with who we are. - sees the things that force us to connect with who we are. and ij sees the things that force us to - connect with who we are. and i think that is— connect with who we are. and i think that is transparent _ connect with who we are. and i think that is transparent as _ connect with who we are. and i think that is transparent as she _ connect with who we are. and i think that is transparent as she goes - connect with who we are. and i think that is transparent as she goes on i that is transparent as she goes on the adventure _ that is transparent as she goes on the adventure. it _ that is transparent as she goes on the adventure. it was _ that is transparent as she goes on the adventure. it was great - that is transparent as she goes on the adventure. it was great to - that is transparent as she goes on the adventure. it was great to see you do— the adventure. it was great to see you do this — the adventure. it was great to see you do this role, _ the adventure. it was great to see you do this role, it— the adventure. it was great to see you do this role, it seemed - the adventure. it was great to see you do this role, it seemed to- the adventure. it was great to see you do this role, it seemed to bel you do this role, it seemed to be quite _ you do this role, it seemed to be quite different. _ you do this role, it seemed to be quite different. you _ you do this role, it seemed to be quite different.— you do this role, it seemed to be quite different. you have some fun with it. it quite different. you have some fun with it- it was _ quite different. you have some fun with it. it was very _ quite different. you have some fun with it. it was very daunting - quite different. you have some fun with it. it was very daunting for - quite different. you have some funj with it. it was very daunting for me in the beginning, _ with it. it was very daunting for me in the beginning, but _ with it. it was very daunting for me in the beginning, but once - with it. it was very daunting for me in the beginning, but once we - in the beginning, but once we started — in the beginning, but once we started to _ in the beginning, but once we started to get in the stream of it, it became — started to get in the stream of it, it became a — started to get in the stream of it, it became a lot of fun to play. the film has been _ it became a lot of fun to play. tie: film has been getting a good response from critics and audiences and is most definitely very much part of the oscars race, it is

expected to pick up several nominations. many people are impressed by the performance of emma stone and they are fascinated by the kind of woman they are betraying, and if he does something unusual for mainstream cinema. one of the things that people comment on is how sexually uninhibited the character is, why do you think we don't often see sexually open and joyous representations in mainstream cinema nowadays? i representations in mainstream cinema nowada s? ~ ., , representations in mainstream cinema nowada s? ~ ., ., nowadays? i think it has got a little bit prudish _ nowadays? i think it has got a little bit prudish and - nowadays? i think it has got a little bit prudish and a - nowadays? i think it has got a little bit prudish and a new. little bit prudish and a new victorian— little bit prudish and a new victorian age _ little bit prudish and a new victorian age in _ little bit prudish and a new victorian age in a - little bit prudish and a new victorian age in a sense. . little bit prudish and a new. victorian age in a sense. i'm little bit prudish and a new- victorian age in a sense. i'm not sure _ victorian age in a sense. i'm not sure why— victorian age in a sense. i'm not sure why we _ victorian age in a sense. i'm not sure why we have _ victorian age in a sense. i'm not sure why we have moved - victorian age in a sense. i'm not sure why we have moved away, i victorian age in a sense. i'm not. sure why we have moved away, we think— sure why we have moved away, we think we _ sure why we have moved away, we think we are — sure why we have moved away, we thinkwe are so— sure why we have moved away, we think we are so free, _ sure why we have moved away, we think we are so free, you - sure why we have moved away, we think we are so free, you could - sure why we have moved away, we think we are so free, you could put anything _ think we are so free, you could put anything on — think we are so free, you could put anything on social— think we are so free, you could put anything on social media, - think we are so free, you could put anything on social media, people l anything on social media, people think— anything on social media, people think they— anything on social media, people think they are _ anything on social media, people think they are sharing _ anything on social media, people think they are sharing their- anything on social media, people| think they are sharing their whole lives _ think they are sharing their whole lives but — think they are sharing their whole lives but in — think they are sharing their whole lives but in a _ think they are sharing their whole lives but in a sense, _ think they are sharing their whole lives but in a sense, it _ think they are sharing their whole lives but in a sense, it does - think they are sharing their whole lives but in a sense, it does feel. lives but in a sense, it does feel slightly— lives but in a sense, it does feel slightly oppressive. _ lives but in a sense, it does feel slightly oppressive. and - lives but in a sense, it does feel slightly oppressive. and i- lives but in a sense, it does feel slightly oppressive. and i thinkl slightly oppressive. and i think that is— slightly oppressive. and i think that is what— slightly oppressive. and i think that is what is _ slightly oppressive. and i think that is what is remarkable - slightly oppressive. and i think. that is what is remarkable about this movie. _ that is what is remarkable about this movie, this _ that is what is remarkable about this movie, this shaking - that is what is remarkable about this movie, this shaking off-

that is what is remarkable about this movie, this shaking off of. this movie, this shaking off of cultural— this movie, this shaking off of cultural oppression— this movie, this shaking off of cultural oppression and - this movie, this shaking off of cultural oppression and part l this movie, this shaking off of| cultural oppression and part of this movie, this shaking off of- cultural oppression and part of that is how— cultural oppression and part of that is how we _ cultural oppression and part of that is how we approach _ cultural oppression and part of that is how we approach sex. _ cultural oppression and part of that is how we approach sex. i - cultural oppression and part of that is how we approach sex.— is how we approach sex. i want to ask ou, is how we approach sex. i want to ask you. given — is how we approach sex. i want to ask you, given that _ is how we approach sex. i want to ask you, given that we _ is how we approach sex. i want to ask you, given that we live - is how we approach sex. i want to ask you, given that we live into i ask you, given that we live into mulch was times, look at ukraine, the middle east, the usa is very polarised. what can an art film like this give people at this time? it can bring a kind of personal liberation from conditioning that we don't recognise. it can be insidious because _ don't recognise. it can be insidious because it — don't recognise. it can be insidious because it can full us into thinking certain— because it can full us into thinking certain things are truths that are not _ certain things are truths that are not and — certain things are truths that are not and at _ certain things are truths that are not. and at mulch was times like this, _ not. and at mulch was times like this, it _ not. and at mulch was times like this, it is — not. and at mulch was times like this, it is all— not. and at mulch was times like this, it is all the more important to see _ this, it is all the more important to see clearly and be compassionate with each _ to see clearly and be compassionate with each other and be tolerant. the film has with each other and be tolerant. film has been with each other and be tolerant. tie: film has been surrounded by goodwill as it moves into the academy awards contest and predictions are that emma stone could well take home the best actress prize for what may be a career defining role.

now it's time for a look at the weather. hello there. it's another cold day today, mostly dry, mind you, thanks to high pressure but we will see, i think, more cloud around what we have had the last few days. probably the best of sunshine reserve the western areas. the area of high pressure bringing in this cloud to northern and eastern areas which will drift further south and will turn quite grey and gloomy through the middle and south—east england and east anglia. probably the best of sunshine south—west england, south wales. some glimmers for northern ireland and north—west england and probably the best sunshine across scotland throughout the afternoon. temperatures range from around five to seven or eight degrees. now we hold on to the cloud across england and wales during the overnight period. so where we have cloud, they are not quite as cold as where we see clearer skies. skies will be clearest across scotland and northern ireland where we could see some dense fog patches developing. and they will be freezing fog patches as it's going to be quite a sharp frost in northern scotland, temperatures down to minus 7—8 c. less cold where we have the cloud. it means friday will be rather grey again for large parts

of england and wales. could see some breaks appearing so will have some sunshine here and there. but the best of sunshine in scotland and northern ireland after that very cold start. temperatures only rising to about two or three degrees here but six to eight celsius for england and wales. in most places dry once again. changes as we head into the weekend, that high pressure retreats westwards, starts to allow a northerly airflow to developed with arctic air sinking southwards behind these weather fronts bringing increasing chance of snow showers through northern scotland on sunday. on saturday, variable amounts of cloud, some sunshine here and there. again, it's going to be mostly dry just a few showers of rain pushing into northern scotland. the breeze picking up here as well. temperatures six to eight degrees. changes on sunday as that weather front sinks southwards to bring showery rain for central areas. it would tend to fizzle out as it pushes into england and wales. behind it the air turns much colder, strong northerly winds and frequent snow showers developing. even down to the lower levels and accumalating in places.

so low single digits here, six or seven in the sun. we hold on to snow showers and strong cold northerly winds for northern areas into the start of next week. we just need to keep an eye on this feature moving up from the south as there is an abundance of cold air across southern areas. there is just the chance we could see a risk of snow across the south which could be disruptive. so stay tuned to the forecast as the details continue to change.

hello. this is bbc news. the public inquiry into how hundreds of former sub—postmasters were prosecuted based on evidence from a faulty it system resumes shortly — we'll bring it to you live. it follows the prime minister's announcement to overturn hundreds of convictions. that decision comes after an itv drama raised the profile of the scandal.

this morning, a post office fraud investigator has told the public inquiry into the horizon it scandal that he was not technically minded and was not equipped to know if there were bugs in the computer system. stephen bradshaw was part of the team whose work led to criminal proceedings against some sub—postmasters. let us listen back to some of the evidence given back by stephen bradshaw. he was asked by inquiry counseljulian blake when he knew that there may have been issues with the horizon it system. in that there may have been issues with the horizon it system.— the horizon it system. in 2010 and 2011, ou the horizon it system. in 2010 and 2011. you were _ the horizon it system. in 2010 and 2011, you were certainly _ the horizon it system. in 2010 and 2011, you were certainly aware - the horizon it system. in 2010 and 2011, you were certainly aware of l the horizon it system. in 2010 and 2011, you were certainly aware of a body of cases relating to the horizon system that were building up, were you not? horizon system that were building uo. were you not?— horizon system that were building on. were you not?— up, were you not? from that information, _ up, were you not? from that information, yes, _ up, were you not? from that information, yes, and - up, were you not? from that information, yes, and as - up, were you not? from that information, yes, and as i i up, were you not? from that i information, yes, and as i have said, _ information, yes, and as i have said, whenever it has come up in the interview. _ said, whenever it has come up in the interview. i_ said, whenever it has come up in the interview, i took the action is to try and — interview, i took the action is to try and find _ interview, i took the action is to try and find out what the issue with

horizon _ try and find out what the issue with horizon was, hence the logs, and on this