planting trees is good of course, but it is nowhere near enough. planting trees is good of course, but it is nowhere near enoughm washington donald trump will tonight become only the third us president to be tried in the senate, accused of abusing his powers. after the november terror attacks, plans to introduce lie detector tests. £4 billion, the legal bill the nhs in england faces after negligence claims. and coming up, all the sport with sarah. hello, iwill have claims. and coming up, all the sport with sarah. hello, i will have all the news from the australian open, that was not a great one for british hopes. konta and edmonds out. more from you later. now the weather with matt. good afternoon, it is blue or grey skies for the next few days. most places staying dry. i wish i could say the same for spain and france. i will show you what is happening there. also coming up, the duke of sussex arrives in canada to be reunited with his wife and questions remain about what the future holds. raise we're asking you to act as if you love your children more than anything else, the words of greta thunberg as she challenged world leaders in davos. their inaction is fuelling climate change she said. but president trump rejected what he called the prophets of doom. it is a time for optimism, he said. our correspondent sent this report. getting away from it all... donald trump has flown over 4000 miles from washington to the alpine heights of davos, hoping to look more like a president on the world stage, less like a defendant back home. he's treading carefully on all the ice and snow. any fall here would look terrible. but will this gathering of the world economic forum, 5,000 feet up in switzerland, give an embattled president the high ground he craves? even without impeachment, he's way out of step with the main goal of this meeting — to do much more to tackle global temperature rise. this is a time for optimism. fear and doubt is not a good thought process, because this is a time for a tremendous hope and joy and optimism and action. but to embrace the possibilities of tomorrow, we must reject the perennial prophets of doom and their predictions of the apocalypse. they are the heirs of yesterday's foolish fortune tellers and i have them, you have them, we all have them, and they want to see us do badly but we don't let that happen. being here today in switzerland and not in washington, the president may feel he is among friends, surrounded by more than 100 fellow billionaires. but in truth, he's in a much more vulnerable and uncomfortable position than any of them. one of his fiercest critics, greta thunberg, the swedish teenage climate activist, was condemning not just the united states but governments around the world. she accuses them of making empty promises to hide inaction. you say, "children shouldn't worry." you say, "just leave this to us, we will fix this, we promise, we won't let you down. don't be so pessimistic." and then... nothing. silence. or something worse than silence — empty words and promises, which give the impression that sufficient action is being taken. president trump will be using the rest of his time in davos to focus on one—to—one meetings with other world leaders. he will be discussing everything from trade disputes to the huge tensions of the middle east. but the long shadow of events in washington seems to reach here to switzerland. james robbins, bbc news, davos. backin back in washington he is not there, but donald trump will tonight become only the third american president to go on trial in the senate. he is accused of abusing his powers. but with the republican party in the majority in the upper house, it is unlikely the president will be removed from office. will all senators now stand or remain standing and raise their right hand? do you solemnly swear that in all things appertaining to the trial of the impeachment of donald john trump. . 7 yes, these are 100 members of the united states senate, but for the next few weeks, they will also be jurors and judges. they get to fix the rules of the trial and decide on guilt. well, we'll be sitting there in our chairs probably in the order of six hours a day, starting at 1pm eastern time, and then six days a week. so this is going to be, i think, kind of a gruelling exercise but also one that will be public. pthe resident faces two charges. the resident faces two charges. the first is that he abused his power by pressuring the president of ukraine to investigate one of his main democratic rivals, former vice presidentjoe biden. the second is that he obstructed congress by trying to stop officials giving evidence and withholding documents. there are almost no rules for a trial like this and democrats and republicans are completely at odds over whether to call witnesses at all. that all means this trial could last anything from two to six weeks. democrats want to hear from the former national security adviserjohn bolton, who reportedly likened the pressure being put on ukraine to a drug deal. but republicans are threatening to retaliate by insisting joe biden or his son appear too. in the coming days, senate republicans are going to face a choice — will they take their cues from the white house, as leader mcconnell clearly stated, and engage in a cover—up for president donald trump? the president continues to dismiss his impeachment as a hoax, instead focusing on his achievements here at a farmers' rally in texas. and what do i get out of it? tell me. i get impeached, that's what i get out of it. by these radical left lunatics, i get impeached. but that's ok. the farmers are sticking with trump. it would take a two—thirds majority in the senate to convict the president and remove him from office. that is extremely unlikely. nevertheless, these coming weeks will resonate for years to come. here, borisjohnson here, boris johnson has here, borisjohnson has vowed to invite african leaders to the uk regularly. he made the pledge in this meeting with the kenyan president. the kenyan president said the congress was great and said it was the first in a long time we have had this kind of exchange with the uk. new laws to end automatic early release fr prison are being introduced. the measures could involve the use of lie detectors test to assess how much monitoring a released terrorist needs. daniel sa ndford released terrorist needs. daniel sandford reports. the man who carried out the fishmongers hall attack had come out of prison just one year earlier. he had been serving 16 years for preparing terrorist acting, but was released half way through that sentence, prompting criticism of the criminal justice system. the father ofjack merrett, the young man killed here in london said his son would not have wa nted in london said his son would not have wanted his death to be used to justify tougher sentencing for terrorism, but today the government is doing exactly that. watching elite police firearms officers training, the home secretary priti patel announced that by march there will be a new counter terrorism bill before parliament, ending the automatic early release of most serious terrorist prisoners and raising the minimum sentencejudges can pass. we will ensure that we increase sentences to 14 years for the offenders involved in planning terrorist offences and also involved in training for terrorist offences w that, we are clear that we are going to be reviewing licensing conditions so to be reviewing licensing conditions so people do not have early release. ministers say they will introduce lie detector tests to help monitor people recently released from prison. something jack merrett‘s father described as a cynical gimmick. there will be more psychologists and immams involved in reradicalised prisoners. but the mother of one terrorism victim said... it is good to invest in staff, but what is important to is to prevent things happening, which is martin's law, which is putting money into prevent. once someone has been radicalised, no one says there isa been radicalised, no one says there is a hundred per cent they can be deradicalised. police warned their workload has gone up by a third in three years and agree that more needs to be done on diverting people away from extremism. we can talk to professor david cantor. it is a headline—grabber, the idea of lie detector tests for something like this and you don't have to look far, thejeremy this and you don't have to look far, the jeremy kyle this and you don't have to look far, thejeremy kyle show, to see it will be controversial. yes it has been around for about a hundred years, the problem is it is not a lie detector, it is something that measures what you might loosely call emotional response, whether your palms get sweaty, whether your breathing changes and the idea is that when you are telling an untruth, it increases the stress, it is something that is a challenge to think through and therefore it is likely to have some influence on your emissional o' o'—— emotional reactions, but excitement, fear, all sorts of things will generate the same responses. so it is disentangling these to determine whether somebody is lying, which is such a challenge. i'm hoping that requires an element of skill and it depends on what the questions are, how they're asked and what the person asking them is look for. how they're asked and what the person asking them is look fonm is more than that. it depends on having an established procedure that has been found to work. one of the problems with this measures of fizz logical response is that there is no actually standard procedure for using them. and they are based around an interview. they are how do people react to the questions asked of them. so that those questions can va ry of them. so that those questions can vary in all sorts of ways. and finding the appropriate questions that will be useful is very important indeed and as i say, not something that has been very firmly established. so beyond that, there is the need to train people in the process that is known to be effective and that is not easy. there are all sorts of aspects of it. for instance, if you wire somebody up to one of these pieces of kit, they will quickly adapt to the sensation and the mood of it. the early response that a person has maybe very misleading, compared with responses when they have been wired up responses when they have been wired upfor it responses when they have been wired up for it for 10 or 15 minutes. there is a lot of subtleties involved in how you use the kit and that needs a lot of training. involved in how you use the kit and that needs a lot of traininglj wonder why it is in operation already, seven forces in england and wales use these things with existing sex offenders. why is that deemed to be acceptable, when we're quibbling over other offenders. all they're using them for is to see whether people may have broken the rules of their parole and whether there is some aspect of what they're doing that they shouldn't be doing. isn't that they shouldn't be doing. isn't that exactly what they're talk about, asking someone convict offend about, asking someone convict offend a terrorist offence, are you still in touch with those who radicalised you, have you had thoughts of attacking the country, it is things like that isn't it snt it? yes it is getting the background of what the person is part of. but particularly, if you're a terrorist and you have thought your quaye through into the whole process, those are questions you will be asked all the time and not something you will have a physical reaction to. what percentage success would you give a lie detector? the research that i know about suggests that in order to tell whether or not somebody is being truthful, they possibly work in above chance level of 60 or 70% of the time. but they're not nearly so of the time. but they're not nearly so effective in telling whether somebody is lying. that is, people can avoid being detected and lying and they're can avoid being detected and lying and they‘ re often can avoid being detected and lying and they're often only a chance level for that. the key to their use is that people believe in them. with sex offenders, i have been told by people who have studied this, if the offender believes that their truth will come out, they may confess to something before they're even wired up something before they're even wired up to the equipment. thank you very much. you're watching afternoon live. our headlines: president trump launches a stinging attack on environmentalists. in washington donald trump will today become only the the third us president to be tried in the senate. after the november terror attacks, plans to introduce lie detectors tests. on a day of british exits at the australian open qualifier and world number 173 harriet dart was the only one of 5 to come through their opening round matches... opening round matches. she showed superb fight to win a final set tie break against japan's misaki doi. well british number one johanna konta believes her season will still come good after exiting in the first round. she was beaten in straight sets by tunisia's ons jabeur. and leicester tigers have confirmed the news that steve borthwich is to leave england at the end of the season to become their new head coach. i will be back with more after half past. see you then. let's return to the impeachment of donald trump. proceedings start in the senate tonight. let's talk to oui’ the senate tonight. let's talk to our correspondent gary o'donoghue on capitol hill. they‘ re our correspondent gary o'donoghue on capitol hill. they're still deciding how the trial will be conducted, what can we expect later? what you're going to get is a couple of hours of debate and discussion over a sort of resolution that the republican, who are in the majority in the senate, have put forward. that specifies and stipulates thousand trial will be conducted. in specific terms, it says that the democrats have two days and 24 hours to put their case. two days over 24 hour, that is 12 hours a day, beginning tomorrow afternoon and they will be going into the early hours of following morning. the white house will have something system and then there will be questions. only then will there be a vote on whether or not no call more witnesses, that is of course what the democrats want, because they believe that there are key witnesses in this affair involving ukraine that they haven't heard from yet, because they were blocked from talking to the investigation before christmas. is there any chance that donald trump himself might have to give evidence? yeah, i have heard this floated. i think that is very unlikely. he has a huge legal team. including people like kenneth starr, who was the independent counsel under bill clinton, who investigated bill clinton over the monica lewin ski affairand bill clinton over the monica lewin ski affair and another part of that sort of team that defended oj simpson in the nineties. i think it is unlikely that donald trump will appear in his own defence. he threatened a lot of times to speak to the mueller inquiry and be interviewed by them and that never happened. i would would be amazed if the president appeared to answer questions. i'm seeing on the wires reporting that the... impeachment managers have demanded disclosure from trump's lawyer, how significant could that be, he could be a material witness. that would be tricky, he is the white house counsel, the lead lawyer on their side. there is a lot of argument going on at the moment about evidence and to what extent evidence will be included in the record. it is quite technical, but effectively everything that was heard before christmas, the documentation, everything, has to be voted into the record and the republicans may not allow that. the whole weight of evidence is not automatically going to go in there. we will see what happens, but what you're going to get this time around, unlike with the bill clinton impeachment, where the bill clinton impeachment, where the senate voted 100 to one on the rules, they agreed how it should proceed, this time around, 20 years on, 20 more years of partisanship, you will get straight down the line party votes. particularly at this stage of the process on how it should be conducted. stage of the process on how it should be conductedlj stage of the process on how it should be conducted. i know you're not a betting man, if you were, would you go with the republican wish that this is going to be short and in their words sweet, or could it and in their words sweet, or could hdmg and in their words sweet, or could it drag on for a long time? oh, my goodness! well, look... it is very difficult. there are a handful of republicans that could upset this apple cart. there are a handful who have hinted publicly, privately, that they might be prepared to support the idea of witnesses being called. it only needs four of them, just four, to swap sides for that to change the maths in the senate in terms of rules. if they start calling witnesses, that could turn this into a very long process. not least and this is a key point, because if they start calling witnesses that the president doesn't wa nt to witnesses that the president doesn't want to hear from, witnesses that the president doesn't want to hearfrom, likejohn bolton, he will block that through executive privilege and then it has to go to the he supreme court. i didn't a nswer the he supreme court. i didn't answer your question did i?|j the he supreme court. i didn't answer your question did i? i don't think i have ever seen you stumped foran think i have ever seen you stumped for an answer — that is the first time! thank you very much. more from you later on. here the nhs in england owes more than £4 billion in legal fees to settle claims of clinical negligence, accorded to figures received by the beep. —— bbc. brother, son, and nephew. this is hayden. soon after, though, he was rushed to hospital, and died there. he was just six days old. it is every parent's worst nightmare. we just had to there and watch as our son slowly die in front of our eyes, literally. and then he died, in front of our eyes. it has been four years of trauma after trauma. in the face of official silence, they felt they had no choice but to sue. "parental concerns not listened to." i haven't really thought about it as suing the nhs. i've thought about it as kind of fighting for a voice for hayden, and fighting for, you know, acknowledgement of his life and his rights. i don't think we had a choice. you can't bring that person back, nothing is going to bring them back, and the only thing that helps is to have acknowledgement that they existed, that they mattered, and answers as to why, how this happened. the hospital did eventually admit liability, years later. that picture is being repeated across england. payments for clinical negligence have doubled since 2015. last year, the nhs paid out £2.3 billion, but the total cost of outstanding claims now stands at a staggering £83 billion, and we've learnt legal fees make up £4.3 billion of that. doctors fear costs are spiralling out of control, but lawyers for patients claim safety failings is still the biggest issue. the nhs in england says 70% of claims are now resolved without going to court, and it is committed to learn from incidents in order to improve patient safety. but hayden's death is evidence of a system that failed, one his parents believe is in urgent need of reform. the money should be paid on training doctors and nurses. there's a death, and you pay, there's a death, you pay, there's an injury, you pay. and they're not actually fixing the source of the problem, so it'sjust going to be repeated. angus crawford, bbc news. some breaking news from frankfurt, we are hearing the jap