in an historic ruling, kenya's supreme court has overturned the result of last month's election, and ordered a re—run. president uhuru kenyatta says the decision is political, but he will accept the judgement. it's the first time a legal challenge to a presidential vote has been successful, anywhere in africa. anne soy reports from nairobi. celebrating a new lease of life, veteran politician raila odinga gets one more chance to run for president. a last—minute decision to challenge the result of the presidential election paid off. the presidential election held on 8 august 2017 was not conducted in accordance with the constitution, under the applicable law, rendering the declared results invalid, null and void. a shocking and rare judgment. the judges did not limit themselves to what happened on election day until the results were announced. rather, they looked at the electoral process in its totality, from voter registration to civic education, as well as the campaigning and the procurement of election materials. and so, in a sense, thisjudgment sets a strong precedent for election disputes globally, and a high threshold for the conduct of elections. outside the court, celebrations erupted among opposition supporters. it is now back to the drawing board for presidential candidates. as much as i disagree with it, i respect it. i disagree with it because, as i have said, millions of kenyans queued, made their choice, and six people have decided that they will go against the will of the people. the court directed the electoral commission to organise a fresh election, but the opposition says it has no confidence in the current commission. they have committed criminal acts. most of them actually belong injail. and therefore we are going to ask for prosecution of all the electoral commission officers who have caused this monstrous crime against the people of kenya. the constitution states that a new election must be held within 60 days. for now, though, opposition supporters across the country are basking in the glory of the court victory. anne soy, bbc news, nairobi. a little earlier, anne explained why the international election monitors, who declared the vote to be "free and fair", have come under fire after the ruling. the international observers were criticised for rushing to endorse a process, even before the final result was announced. but they did also emphasise the importance of seeking legal means of dispute resolution, and we believe that that pressure is what led to the petition that was decided today. thejudges made a radical decision. it goes against the norm, even in the commonwealth, wherejudges generally tend to show restraint. but then, by so doing, they have demonstrated their independence. anne soy, there. more than moo people are now known to have died after the catastrophic flooding across several south—east asian countries. this year's monsoon season has been particularly heavy, affecting tens of millions of people in bangladesh, nepaland india. many left homeless are now sleeping on roadsides and in makeshift shelters, short of food and clean drinking water. the bbc‘sjustin rowlatt reports from bihar, in northeastern india. those least able to cope are the hardest—hit by the floods. villages and fields were transformed into great lakes here in bihar, one of the poorest states in india. budhia devi says her life has been ruined. translation: i've lost everything. i had a cow and a goat. they were both killed. my house is totally broken, and i'm just left sitting here by the side of the road. i've got nothing left. i just don't know what to do. the people here are subsistence farmers, some of the poorest and most vulnerable people on earth. the floodwaters have begun to drain back, only to reveal the wreckage of homes, and of lives. more than 500 people have died just in this one indian state, 17 million affected. and now there are new concerns. houses, schools, roads — they all need to be rebuilt. and then, of course, there is the danger of disease. filthy water, hot weather, and the lack of basic sanitation can be a deadly combination. people remained in water three days, four days. their homes were submerged in the water. they remained in the water. and, due to waterborne diseases, they were drinking contaminated water. so it's a huge risk. and this is a snapshot from just one tiny part of a catastrophe that is unfolding across much of south asia. the region floods every year, but this is different. exceptional rains have brought devastation right across the foothills of the himalayas, from bangladesh in the east, across northern india and nepal, and now up into pakistan. the death toll from the collapse of a single building in the indian financial capital, mumbai, rose to 33 today. police suspect it was weakened by the torrential rains. and 16 people have died in flash—floods in karachi, pakistan's largest city. but the monsoon‘s fury is not spent yet. more rain is forecast across the region. justin rowlatt, bbc news, bihar. plumes of thick black smoke have again been rising from a chemical plant in texas, which was hit by severe flooding after tropical storm harvey earlier this week. owners of the arkema plant, north east of houston, had warned that its cooling systems had failed. the authorities have evacuated hundreds of homes nearby. president trump will head back to the storm—affected areas of texas on saturday. at his weekly address, he outlined his relief plans. at the request of governor abbott, i declared a major disaster in the state of texas, to ensure that federal aid is available for state and local recovery efforts. i also approved a disaster declaration for louisiana. 0rganisations like the red cross, the salvation army, and faith—based organisations are actively assisting on the ground, and they are doing a fantasticjob. let's ta ke let's take a look at some of the other stories making news the sour. —— news this hour. a us—backed alliance of kurdish and arab fighters in syria says it's now captured the entire old quarter of the islamic state group's main stronghold, raqqa. there's been no independent confirmation of the syrian democratic forces claim. the speaker of the us house of representatives has urged president trump not to scrap a programme that protects young undocumented migrants, known as "dreamers", from deportation. hundreds of people gathered in los angeles on friday to rally against the roll back. the president will announce his decision on tuesday. myanmar‘s rohingya minority could be facing a humanitarian catastrophe, according to the un secretary general. forty thousand rohinga muslims have fled to bangladesh in the past week, amid reports of extreme brutality in a security crackdown. earlier i spoke with tun khin, president of the burmese rohingya 0rganisation here in the uk. we are hearing that mass killings is continuing by the military against rohingya, and many villages are being burned down, even yesterday. and military killing elderly men, women, children, you know... we received that many children, they've been thrown to the fire while they're burning down rohingya houses. and, according to our reliable source, at least 1,000 rohingyas have been killed since 25 august. and some sources are saying might be 3,000-4,000. so quite the situation, according to situation — what we can see there is very hard to confirm. at least 160,000 rohingya become idps. internally displaced people? internally displaced people. and the humanitarian crisis is growing. there is no shelter, no food, no medicine. we also receiving also some information that children are dying, as they are not having food like five or six days now. that is what horrific situation going on, against rohingya, in burma. there is no doubt of the difficulties being faced, the terrible conditions being faced, by those trying to flee. but the burmese military would say that they are actually fighting militants whose ranks have been swelled, they say, by rohingya men. obviously i don't expect you to agree, but that is what they say about why they have lodged this crackdown. yes, the attacks happened on 25 august. you know, some young rohingya groups, they attacked police posts. but the military are not targeting those attackers, you know. military targeting the whole rohingya population — they are taking a collective punishment. we are hearing from the ground that, you know, militaryjust go in, village by village, they're burning down elderly men, women, and children. they are killing, slaughtering. that is what's happening. that's what we've been hearing. the president of the hermes rohingya organisation in the uk. —— burmese. stay with us on bbc news. still to come: tributes to cardinal cormac murphy—o'connor — the man who led the roman catholic church in england and wales for nearly a decade. she received the nobel peace prize for her work with the poor and dying in india's slums. the head of the catholic church said mother teresa was a wonderful example of how to help people in need. we have to identify the bodies, then arrange the coffins and take them back home. parents are waiting and wives are waiting. hostages appeared, some carried, some running, trying to escape the nightmare behind them. britain lost a princess today, described by all to whom she reached out as irreplaceable. an early—morning car crash in a paris underpass ended a life with more than its share of pain and courage, warmth and compassion. this is bbc news. the latest headlines: kenya's electoral commission has come under heavy criticism after the supreme court annulled the results of last month's presidential election, citing irregularities. the devastating floods across large parts of south—east asia have killed at least 14,100 people. "1,400 people. floodwaters in houston may barely have begun to recede, but already, scientists in the us are studying the patterns and effects of storm harvey. michael wehner is one of those scientists he joined me a short time ago. it is an unprecedented event, unusual in many aspects and, so, it is a serious tragedy for the people of texas but it is also an opportunity because of the high quality data, meteorological data that has been collected about the landfall of hurricanes that stalled out like this one did. and that is why it caused so much damage, it slowed down to a walking pace, didn't it? yes. this has happened before, but it is not frequent. the copious amounts of rainfall that fell onto the houston area is of particular interest to me. i study the effect of climate change on extreme weather and it is my opinion that some of that rain, that total rainfall was increased by around 10—15% because of the warm temperatures in the gulf of mexico. you mention climate change. how do you think your research may outline the difference it has made or how we can approach these events in the future? there are two interesting questions. one is easy, one is hard. the easy one is how much more rain there was because it was warmer. the difficult question is did climate change have any influence at all on the chance of the storm stalling as it did? that is a more difficult question. these things will take some time to settle. there will be a difference of opinion among scientists. that's how we do our business. when somebody makes a hypothesis, they test it, they publish it, it gets peer reviewed and if it passes peer review then the rest of the community will go and critique it with their own point of view. and eventually, hopefully, the truth comes out. the minister leading britain's effort to negotiate a new relationship with europe has met us business leaders to reassure them that a trade deal will be found. david davis flew to washington following brexit negotiations in brussels, as eleanor garnier now reports. the prime minister showing how it's done. at a meeting with the emperor ofjapan, a lesson in delicate diplomacy. but it seems her trade secretary hadn't got the memo. speaking injapan, he accused the eu of bullying the uk into agreeing a brexit divorce bill before it'll start negotiating any future trade relationship. we can't be blackmailed into paying a price on the first part. we think that we should begin discussions on the final settlement because that is good for business. it's no surprise there is a bit of rough and tumble at this stage in the talks and it's significant liam fox didn't repeat the word blackmail when asked exactly what he meant. a moment perhaps when frustration got the better of him. but it's certainly not a phrase you can expect the prime minister to be uttering. fresh from his talks in brussels this week, the brexit secretary gave a speech to business leaders in washington today and tried to laugh away his colleague's controversial comments. i never comment, i know what you're doing, i never comment on other ministers‘ views on these things. look, we are in a difficult, tough, complicated negotiation. i have said from the beginning it will be turbulent. what we're having at the moment is the first ripple. and there will be many more ripples along the way. critics here claim liam fox's talk of blackmail will only make matters worse. his language is intensely unhelpful. this is sabre rattling from a trade secretary who is twiddling his thumbs. because he cannot do anything until the trade position of the uk has been resolved with the eu. the prime minister rounded off her trip cheering on the gb wheelchair basketball team. but when it comes to brexit, the government is still searching for some big points, and will be hoping for more winning ways to come. eleanor garnier, bbc news, westminster. tributes have been paid to the former leader of the roman catholic church in england and wales, cardinal cormac murphy—o'connor, who has died at the age of 85. 0ur religious affairs correspondent martin bashir looks back at his life. ..may also keep us faithful to our lord jesus christ forever. cardinal cormac murphy—o'connor served as the head of the roman catholic church in england and wales from 2000 until 2009. he was a man of great faith and of great fun. he had an infectious laugh, and just loved to be cheerful and to encourage people around him. and it's that very, very positive attitude to life, which he saw as a gift of god, and to the challenges that we all face. his theological acumen was recognised early and he served as rector of the english college in rome before becoming bishop of arundel and brighton. and it was in sussex that he faced his greatest public challenge. god of power and mercy... a local priest, michael hill, had been accused of child sexual abuse. then bishop murphy—o'connor decided to redeploy him as a chaplain at gatwick airport. hill went on to abuse children and was jailed in 1997. cormac murphy—o'connor refused to resign, but described his management of hill as a grave mistake. out of that terrible case came his decision to ask lord nolan to help him rethink how the catholic church in this country dealt with child abuse issues, try and avoid such terrible things happening again. although he did not engage directly in politics, it was his careful nurturing that led tony blair to convert to catholicism in 2007, after he had stepped down as prime minister. a year later, cormac murphy—o'connor published a book entitled faith in the nation, in which he argued against the erosion of religious values in public life. it was this assertion that the christian faith must play a role in the public square, that cormac murphy—o'connor had contended for throughout his life. the former archbishop of westminster, cardinal cormac murphy—o'connor, who's died, at the age of 85. one of the most powerful x—ray machines ever built has been unveiled in the german city of hamburg. the facility, which has cost more than a billion euros, will be used to study the detailed structure of matter, atom by atom. david campanale explains. hidden nearly a0 metres beneath german cornfields in hamburg's residential areas is one of europe's most ambitious, cutting edge research projects. it will allow researchers for the first time to look deep inside matter. the xfel, as it is known, has been ten years in development, and is housed in a tunnel 3,500 metres long. the machine is a particle accelerator that, 27,000 times a second, can produce a brilliant and extremely short flash of x—rays. translation: the light flashes we generate are about 100 femtoseconds long, which is more or less the light needed to cross a human hair. reaching the moon takes about a second, so we generate extremely short light pulses, which allow us to freeze extremely quick reactions, for example, in biological material. what scientists say really sets the xfel apart is its super fast time structure in the flashes, which will catch proteins and catalysts in the very moment they are made or broken, and even make a film of that change. but the project's head is not driven by questions of immediate use. translation: i'm curious in what i may see in five or ten years. today, i would say, not with all the will in the world can i imagine the specific use of it. but from the history of science, we learn that often someone said there is no utilisation. what's the need of electromagnetic waves? researchers hope using xfel will lead to new routes in understanding the causes of disease, and to improve the efficiency of industrial processes. the project will begin operations with 11 nations as members of its consortium. a nurse at a hospital in the us state of utah has said she was assaulted by police after refusing to give officers a blood sample from one of her patients. alex wubbels declined the request, because the police didn't have a warrant or the patient‘s consent. the bbc‘s tim allman has more. the university of utah hospital in salt lake city. a nurse, alex wubbels, is talking to police officers. they want a sample of blood from one of her patients — the driver of a lorry, who was badly burned in a crash, and is now in a coma. he is not under arrest, he can't give consent, and the police don't have a warrant, so the nurse says they can't have the sample. i'm just trying to do what i'm supposed to do. that's all. in the end, one of the officers, named by local media as detectivejeff payne, decides he has had enough. done, we're done. you're under arrest. you're done. he grabs hold of the nurse and takes her into custody. screaming somebody help me! visibly upset, she is taken outside and put in handcuffs — arrested, she believes, for simply doing herjob. the onlyjob i have as a nurse is to keep my patients safe. a blood draw is not — itjust gets thrown around there like it's some simple thing. but blood is your blood, that's your property. now, the city's mayor has waded in, saying it was completely unacceptable, and that she has personally apologised to alex wubbels. the city's chief of police was similarly contrite. i'm sad at the rift this has caused between law enforcement and the nurses we work so closely with. i want to be clear — we take this very seriously. it is reported that the officer involved has now been stopped from collecting blood, but was otherwise not being disciplined. the university of utah issued a statement praising the nurse for her decision to focus, first and foremost, on the care and wellbeing of her patient. tim allman, bbc news. clinton will of course on our website. this is bbc news. —— plenty more. hi there. we've got some decent weather coming up to start the weekend. with high pressure in charge, we'll have some sunshine to start the day on saturday. mind you, some of you might have been woken in the night by the odd rumble of thunder. a few storms from lincolnshire, down through cambridgeshire, hertfordshire and essex, as well, all clearing out of away, and starting off then on saturday with relatively cool air in place. temperatures 10—12 degrees in the towns and cities, but cooler than that out in the countryside, so certainly a chill in the air. will be a fine start to the day, though, on saturday. i mentioned the high pressure with us, that is going to bring some sunny spells. but the second half of the weekend will bring a change in the weather. we'll have a bright start for many, but outbreaks of rain will work in from the west. ok, here is saturday's weather forecast, and it should be a glorious start to the day, with clear blue skies for many of us first thing saturday morning. into the early stage of the afternoon, there will be a little bit of cloud bubbling up, particularly across parts of southern and eastern scotland, eastern areas of england, and that cloud could bring one or two very isolated, light showers. but the vast majority will enjoy fine and dry weather. it will tend to cloud over, though, for western counties of northern ireland as we go through saturday afternoon, the breeze picking up here ahead of a weather front. but for england and wales, plenty of sunshine around, and in the sunshine, widely, we'll see temperatures climbing into the high teens to low 20s. the highest temperatures probably around london and the south—east of england, at around 22 celsius, so very similar to what we had yesterday. it will feel pleasantly warm in that sunshine, but there are those isolated showers towards the coastline of essex and into parts of east anglia. here is the charts from saturday into sunday. we lose this area of high pressure. these weather fronts on the way. they will begin to show their hand as we go through the night time, with an area of rain working into northern ireland first, and then later in the night we'll start to see the cloud thicken, and outbreaks of rain arrive on strengthening winds across the south—west, wales, the north—west of england, and western parts of scotland, too. it will be a relatively mild night, though, as the clouds continue to work in, 12 to 15 degrees for saturday night. here is the chart for sunday — well, quite a different day. a bright start, yes, for eastern scotland and central and eastern england, but the brightness will not last. we will see the cloud thicken up, as this band of rain pushes its way east, with with one or two heavier bursts around. even behind that rain, at will probably stay cloudy at times, before brighter spells come in. temperatures between 15 and 19 celsius, so a cooler day. monday will have a few spots of light rain and drizzle across western coasts and hills, and more persistent rain working into the north—west. despite the cloudy conditions, temperatures are not doing too badly, highs again about 22. that's your weather. and then —— this is bbc news, and these are the headlines: there have been celebrations in kenya after the supreme court annulled last month's presidential election and ordered a re—run. president uhuru kenyatta said the decision is political, but he'll accept the ruling. he had won byjust over1 million votes. the opposition claimed there were widespread irregularities. fire is burning out of control at a chemical plant in texas which flooded in the wake of storm harvey. the area has been evacuated.