A man who stabbed a passenger to death in a row on a train, has been found guilty of murder and jailed for life. Lee pomeroy was travelling with his 14 year old son, when he was stabbed 18 times by Darren Pencille, on the guildford to London Service injanuary. The jury at the old bailey rejected pencilles claim that he was acting in self defence, and his girlfriend was also found guilty of helping him hide from police. Our correspondent Richard Galpin reports from the old bailey. It should have been a fun trip together on the train. A father, lee pomeroy, and his young son heading to london. But also on board was Darren Pencille, who had previously been convicted for stabbing a man in the neck. Cctv footage shows pencille and mr pomeroy arguing because the aisle was blocked it escalated rapidly. You bleep heard what i said put your hands on me, i dare you, i dare you mr pomeroy, who allegedly had a reputation for starting fights, pursued pencille into the next carriage. Pencille was then overheard saying he was going to kill that man and seconds later stabbed mr pomeroy 18 times. Bleeding profusely, mr pomeroy collapsed. Pencille got off the train. From clandon station, he headed here into the fields. But he was soon spotted by a local resident here, who said he looked distressed and that he was sweating. She asked him if he was 0k, and he said hed been in an accident. But later, in the woodland here, she found a bloodstained hat and called the police. But pencille was already being driven back by his girlfriend, chelsea mitchell, to herflat in farnham, which the following morning, was raided by the police. Stand still do not look at me, stand still both were arrested. Today, pencille was sentenced to a minimum of 28 years in prison. Chelsea mitchell was sentenced to 28 months for assisting an offender. After sentencing, the police gave a statement with mr pomeroys wife lana alongside. It was solely the actions of a murderer who, when challenged, could only respond with vicious threats and arm himself with that knife, which led to the death of mr lee pomeroy. The court heard that pencille, a paranoid schizophrenic, had panic attacks in Public Places such as trains. But the day before the killing, a psychiatrist assessed him, concluding he was not a risk to himself or others. Just 2a hours later, Darren Pencille committed murder. Our family has been destroyed by this. If this can happen to a law abiding 51 year old man just going about his business on a train in the middle of the day, this terrifies me. Summing up today, thejudge said, truly, this was a senseless loss of life. Richard galpin, bbc news. Now on bbc news, our world. China is now thought to be holding more than a million muslims in camps in its far west region of xinjiang. Reporterjohn sudworth gets rare, highly controlled access. Muslims are being detained. Mosques demolished. Thoughts transformed. And children are disappearing. With rare official access. Have you been convicted of a crime . 0ur own evidence. And testimony from more than 60 grieving relatives. Where are they now . We find out whats really happening in chinas far Western Region of xinjiang. China used to deny that these places exist. But now we are being given a tour. Taken inside some of the giant secure facilities thought to hold more than a million muslims. Music plays this is what china wants the world to see. Offered up as proof that these are not prisoners but students. Willingly being guided away from extremism. Is it your choice to be here . Government officials watch over every interview. This is how thoughts are transformed. Xinjiangs uighurs, kazakhs and other minorities who have their own languages and culture, spend long hours rote learning chinese. Studying chinas tightening restrictions on religion. And replacing their religious and cultural identity with something else. I love the communist party of china, this man has written. How often are you able to pray . These are places where adults wear uniforms. And where they dont go home at the end of the day, but sleep up to ten a room, sharing a toilet with no idea how many months or years it will be before they can return to theirfamilies. If they dont want to come, then what happens . It isnt a place where people have to come . Obey the rules, stay until you allow them to leave . It sounds more like a prison, even if its a prison where you can do some art. I think a definition of a prison isnt about what happens inside. Its whether you can leave or not. Over the past few years, a vast network of high security facilities has been built across chinas Western Region of xinjiang. Surrounded by high walls, barbed wire and watchtowers. But in some of the places we are being taken to, the satellite images show the internal security fencing and what look like watchtowers were taken down shortly before the tours forjournalists began. And empty exercise yards have been transformed into sports facilities. On full display when we visited. But if these are show camps, what might that say about the places were not given access to . With their watchtowers and barbed wire still in place, they look much less like schools. And we are much less welcome. And everywhere we go, the locked and deserted homes hint at the scale of the system, and at a definition of extremism that now includes the mildest of islamic customs and beliefs. So, here it is in black and white a notice telling People Living in this village that certain religious practices are banned. At this point here, number ten, it says the wearing of long beards for young men is not to be allowed. Rakhima senbay, who now lives in kazakhstan, spent more than a year in the chinese camp system just for having whatsapp on her phone. Only towards the end was she in a facility resembling those weve been shown. Mostly she was in much tougher camps, including this one. When you see the pictures that china is showing the world, of happy muslims studying hard, dancing even, inside these facilities that they call schools, what do you think . Singing what, one wonders, might these people have been told by the officials ahead of our visit . Then they switch from uighur, their mother tongue, to chinese lyrics, written by president xijinping. Singing theyve been convicted of no crime, faced no trial. But, were told, china now believes it can determine their guilt in advance. Its a policy of treating people as pre criminals. Backed up in gruesome detail by an exhibition that were taken to. Its designed to prove that china is responding rationally to years of sporadic separatist violence. We are also taken to the id kah mosque in the city of kashgar, one of xinjiangs holiest sites. Faith is alive and well, we are told, with a government approved imam insisting that there is no ban on long beards. Once again, the satellite pictures tell a different story. Right across the region, mosques are being destroyed. Over the past two years, in cities, towns and villages, dozens of religious sites once clearly visible on the satellite images have been turned into patches of bare earth. I asked if we can get to the mosque and he says the road is closed. We think its onlyjust been closed moments before our arrival. Weve seen a number of other people on motorbikes, scooters, some cars as well, stopping and asking why they cant get through. We are hoping to find out whats happened to this, the gatehouse of the aitika mosque in the city of keriya. Its distinctive shadow shows it was Still Standing in late 2017. But now its gone, overwhelmed by the surrounding commercial development. We get close enough to film the building work. Marooned in the middle, the mosques prayer hall with its domed towers is still intact. But there is Construction Machinery on the spot where the gatehouse once stood. Nearby, traditional uighur neighbourhoods are being demolished too. The old homes are visible in this image from two years ago. Whole swathes have disappeared just a few months later. This patch of land encapsulates perfectly the two driving forces of modern china. Political stability and economic development. There is no doubting that these neighbourhoods were poor, but by demolishing them, by repressing the faith of those who lived in them and by forcing hundreds of thousands of them into re education, the concern is that a whole history and culture are being wiped out. And now the bbc has new evidence of what is happening to their children. In account. After account. Gathered in a meeting hall in istanbul. Uighurs tell us again and again of the immeasurable grief of separation from their loved ones back home. Do you have any idea who is looking after your children now . Do you know where your children are now . For decades, ties of language and faith have brought uighurs to turkey, but now there is no way back. The three children at home, do you know where they are now . Do you know whos looking after them . Your husband was arrested . Abdurahman tohti moved to turkey in 2013. Three years ago, his wife and children went back to xinjiang for a short trip and vanished. Then, earlier this year, he found something online. Hes certain its his son, abdulaziz, in his orphanage, speaking not in uighur, his mother tongue, but in chinese. Alongside the camps, china has been building something else. Giant new schools, many with huge dormitories. This kindergarten sleeps hundreds. The authorities seem to want to keep them hidden. We find one street blocked by the police. Reports say there is a school here for 2000 children of detained parents, but we are not allowed to get any closer. This kindergarten for the children of detainees has barbed wire, cameras and signs that say only chinese should be spoken. Senior officials deny that family separation on such a scale would cause lasting psychological damage. What is happening to those children where extended families have been taken into the camp system . But such cases are not hard to find. Amine wayit, who now runs a clothes shop in turkey, recently found this picture of her stepdaughter on social media. Its a sign her close relatives are in the camps. Her stepdaughter in a boarding school and wearing traditional chinese costume. If you could send a message to her today, what would you tell her . Buried deep on the chinese internet, there is evidence to suggest there is now a deliberate policy to separate children from their roots. I have uncovered very detailed evidence of how both students and teachers in these boarding schools, if they fail to speak chinese to each other, there are severe penalties. Other documents found by mr zenz mentioned Psychological Counselling for the children of parents taken to the camps, and the need to make up for the lack of family love, suggesting china is all too aware of the impact. Since the camps were built, hes found an 82 jump in kindergarten places, and by even more in areas of xinjiang where uighurs are the majority. Chinas National Increase was just 8 . The xinjiang government is attempting to gain full control over the young generation, to literally raise a new generation that has been cut off from original roots, from religious beliefs, from cultural knowledge, and even from their own language. I believe the evidence really points to what we must call a cultural genocide. Kalida akytkankyzy now lives in kazakhstan. Last year, her family members back in xinjiang were all taken to the camps, leaving her 1a grandchildren parentless. So she phoned their village official. Kalida cant look for her family. Anyone returning to xinjiang is likely to end up in the camps. So we look for her. The family home is locked and deserted. We call the village official. But he hangs up on us too. Other families weve spoken to also give us permission to search for their missing relatives. But we find no one. Only the signs of a giant vanishing. Back on our official tour, job training, we are told, is crucial for peoples transformation. How long does it take to learn how to make a bed . Just to learn to make the bed, four months . We would call that brainwashing. In 2015, we filmed the crowds, young and old, turning up to pray at the id kah mosque. Beards were easy to spot. Four years on, the faces are clean shaven. And this is the scene just before prayer time. Inside, a few elderly men gather in silence. Isnt the truth that what weve just seen is proof that china has suffocated islam in this region . Until recently, this place was the vibrant heart of a deeply devout society. Now, theres almost no one left. Late at night, we return uninvited to one of the camps weve been taken to on our official tour. Long after dark, the lights still burn. And the sound of thoughts being transformed echoes late into the night. Chanting. We have some fine summer weather to the course of the weekend. We expect to see a few isolated showers here and there but most places should avoid them. Not as warm or as humid as it has been for the last week or so. As it has been for the last week or so. Pressure out there as we start saturday morning, with sunny spells in the south from the word go. Light rain across northern and eastern scotland. Through the day we could catch the odd shower through parts of the pennines down towards the midlands and the london region. Temperatures between 17 and 2a celsius. A small chance of a shower at wimbledon. On sunday higher pressure builds so it looks like the drier day of the weekend. Just a gentle northerly breeze. A little cooler around the eastern coast of scotla nd cooler around the eastern coast of scotland and Eastern England with the breeze coming from the north sea. The warmest weather on sunday towards the south west with highs of around 23. Goodbye for now. This is bbc world news, im reged ahmad. Our top stories. Braced for storm barry, louisiana declares a state of emergency, with warnings of high winds and heavy flooding as the Tropical Storm gathers strength. Facebook reportedly faces a multi billion dollar fine over the misuse of personal data and privacy breaches. Testing times in the relationship between the us and turkey as ankara Takes Delivery of a Russian Missile defence system. And wimbledon prepapres for the first of its major finals this weekend as simona halep takes on serena williams