this is bbc news. i'm julian worricker. the headlines at apm: us vice president mike pence warns that his country's "era of strategic patience" with north korea is over. prince harry reveals he's had counselling, to help him come to terms with the death of his mother. i can safely say that losing my mum at the age of 12 and therefore shutting down all of my emotions for the last 20 years has had a quite serious effect on not only my personal life but also my work as well. turkey's president erdogan promises to press ahead with new sweeping powers, after narrowly winning the constitutional referendum. at least 12 people suffer burns after a suspected acid attack at a london nightclub. also in the next hour: a new super—sewer under the river thames. work has begun on the structure, big enough to deal with over a million tonnes of raw sewage per year. and coming up at 4:30pm, we'll be

looking at how the city of hull is being transformed by a year—long festival of arts and culture. good afternoon and welcome to bbc news. us vice president mike pence, who's on a visit to south korea, has warned that his country's "era of strategic patience" with north korea is over. it comes as south korea and the united states agreed to speed up a defence system designed to intercept north korean missiles, something china views as a threat to its own military. our seoul correspondent stephen evans reports. the american vice president went to the front line, the demilitarised zone between north and south korea, what he called the frontier of freedom. for him, the visit was personal because his father

fought in the korean war. from the other side today, north korean guards looked back and took pictures. vice president pence‘s mission today, to affirm support for the alliance between the us and south korea. we will defeat any attack and we will meet any use of conventional or nuclear weapons with an overwhelming and effective response. over the past 18 months, north korea has conducted two unlawful nuclear tests and an unprecedented number of ballistic missile tests, even conducting a failed missile launch as i travelled here for this visit. the era of strategic patience is over. on saturday, north korea displayed row upon row of missiles. on sunday, a day later, they fired a dud, anotherfailure, and some experts wonder how many of the missiles on display would actually work.

in the far north of the country, the ground is ready for another nuclear test. debris can be spotted from the air after tunnelling. the us has started installing an anti—missile system in south korea. mr pence said all options were now on the table, implying that attacking north korea remains possible, despite warnings that that could spark war. what remains unclear is how the trump administration is going to persuade or force kim jong—un to renounce his nuclear ambitions. everything is on the table, we are told, but they are starting to talk now about the military option not being quite to the fore. north korea fires off missiles frequently. sometimes they succeed and sometimes they fail. would the us attack north korea if it thought a long—range missile launch was about to happen?

nobody knows. mr trump says his policy is tougher than those of his predecessors, but that assertion is yet to be proven. stephen evans, bbc news, south korea. let's go live to washington and our correspondent, gary o'donoghue. i suppose it's another phrase we need to ask the question, what does he mean, the era or strategic patience is over? it's a bit impenetrable as phrases go. effectively, what they are talking about is, i suppose, ten years now of north korea explicitly and openly trying to develop ballistic missiles and nuclear weapons, repeated rounds of sanctions at the un, repeated attem pts of sanctions at the un, repeated atte m pts to of sanctions at the un, repeated attempts to try and pressurise china

to put pressure on north korea, because china is the only country in the world that north korea in any way listens to, and that, to the extent that it does, is in some doubt. that is what i suppose you might call this ostrich —— this strategy of strategic patience, if you like. what donald trump has done is he has sent a whole bunch of ships to the region. there is quite a lot of us ships in the pacific anyway, as it goes, so in a sense it isn't a major escalation. they are saving up and down the western pacific most of the time anyway. but i think there is a real threat there anyway, given what happened in syria and afghanistan, of some sort of retaliation. mike pence, the vice president, has been at the border today, the demilitarised zone, as they call it. he was meant to stay inside but he went outside, he looked across the border, where you

can looked across the border, where you ca n eye ball looked across the border, where you can eyeball the north korean guards. a p pa re ntly can eyeball the north korean guards. apparently they were taking pictures of him there, just get a real sense, and there is something every symbolic as well, an american vice president standing there, in a sense embodying that morning, that diplomatic and military warning the us is trying to communicate to north korea. i suppose the point is, if you continue to use more strong arm language, and there is, as you say, military activity going on as well, at some point it has to lead to something, doesn't it? it has, and thatis something, doesn't it? it has, and that is the risk from the americans' side, that you ratchet up expectations and, when it comes to it, the risks of pulling the trigger are too high. because the problem is that there is a phrase that military people have a cold the tyranny of proximity. the idea is that. if you hit north korea, is sufficiently u nsta ble hit north korea, is sufficiently unstable and unpredictable that, in

that dmc that we were looking at, those hills and mountains behind have artillery, conventional artillery dug in all along there, missile silos, everything. 30 miles south of the border is seoul, a city of 10 million people. so their ability to retaliate and do significant damage south of the border is very, very real, and nobody doubts that they would do that, really, if they were hit. it's a stand—off, a bit of a bluff. in the meantime, what president trump is trying to do is he is trying to combine a normal diplomatic pressure they have been putting on china for yea rs they have been putting on china for years along with talk of a trade deal with china. he thinks trade talks with the chinese, and that he can doa talks with the chinese, and that he can do a sort of combined deal whereby they help sort out north korea and he stops going on about them being a currency manipulator and tries to get a proper trade deal sorted out. that is the strategy

that seems to be going on at the moment. in the meantime, there is a threat from china to stop oil shipments to north korea. north korea doesn't get oil from anywhere else. of course, with a huge military, almosti million men under arms in north korea, the one thing that they need is gasoline. so any threat to cut off its oil, it has none of its own, is a very dangerous situation for the north. thank you, gary o'donoghue. prince harry has revealed that he has had counselling to help him come to terms with the death of his mother, princess diana. the prince told the daily telegraph that he spent 20 years not thinking about the death of his mother when he was 12 but eventually sought help after two years of "chaos". mental health charities have welcomed the prince's decision to speak so candidly. our royal correspondent peter hunt has the story. this is a senior royal as we've never seen or heard them before. prince harry is the most high—profile person yet to talk

personally about his mental anguish. in doing so, he's hoping to break the taboo that still surrounds mental health. as a child, harry, with his brother william, had a close, fun relationship with diana, princess of wales. she was, according to the prince, quite simply the best mum in the world. in 1997, with quite literally the world watching, harry walked behind his mother's coffin after she'd been killed in a car crash in paris. as an adult, 20 years on, he is now talking about the impact of his bereavement. i can safely say that losing my mum at the age of 12 and therefore shutting down all of my emotions for the last 20 years has had a quite serious effect on not only my personal life but also my work as well. my way of dealing with it was refusing to ever think about my mum, because why would that help?

it's only going to make you sad. it's not going to bring her back. growing up, not confronting his mother's death, prince harry suffered anxiety and came close to a breakdown. eventually, after being encouraged by william, he saw a counsellor. all of a sudden, all of this grief i'd never processed started to come to the forefront. i was like, there's actually a lot of stuff i need to deal with. it was 20 years of not thinking about it and then two years of total chaos. as i'm sure you know, some of the easiest people to speak to are shrinks — i know the americans call them shrinks — someone you've never met before. you sit down and say, listen, i don't actually need your advice. can you just listen? just listen to me. and you just let it all rip. you've done that, have you? i've done that a couple of times, more than a couple. it's great. to have someone of his profile talking so openly about stuff in his head is so important. i can't even begin to tell you how important. if, when i was 12 and i first got ill, if members of the royals were standing up and talking about their mental health, i think how different the subsequent

decades could have been. kate, william and harry are behind a heads together campaign that is being supported by the london marathon. the racing royals with influence hope it will be a mental health marathon. peter hunt, bbc news. president erdogan of turkey has pledged to press ahead with sweeping changes to the country's political system, after narrowly securing support for plans to increase presidential powers in a referendum. the main opposition party in turkey says it will challenge the result. our correspondent mark lowen reports from ankara. victory, but not as sweet as they'd hoped. government supporters partied into the night, confident they'd won this referendum. it was though with a narrow margin. the opposition cried foul but, for those celebrating, a chance to assert their win and warn it's irreversible. translation: we are the winners, the people have won, and that's the best.

god willing, we'll have better days to come. president erdogan believes he has a mandate for the biggest political change in modern turkish history. he told supporters everybody must accept the result, which would concentrate huge power in his hands. he even proposed another referendum on restoring the death penalty. that would end turkey's last remaining hopes ofjoining the eu. opposition parties won't fall silent, claiming massive irregularities. they say 1.5 million invalid ballots without an official stamp were counted, and have vowed to contest the result. translation: a wrong decision, an illegal decision made this referendum controversial. we don't find this appropriate and we will pursue this until the end. what was president erdogan's pet project has made this country more

polarised than ever. pro—government headlines today hailing a revolution of the people. the other side talking of an overshadowed ballot. this vital western ally in a volatile region, still desperately seeking stability. translation: i don't think this is enough, because the result of the referendum is 50—50. it's obvious that a large part of society does not accept this referendum. translation: i don't know what the new system will bring but i am happy, because a person i support has become an executive president. turkey has lost its way. a contested referendum, deep splits, terror attacks, freedom of speech eroded. just a few years ago, this country was held up as a model of a muslim democracy. how far and fast it has fallen. mark lowen, bbc news, ankara. international observers have highlighted serious concerns about turkey's referendum, saying that the yes campaign had an unfair advantage, including the misuse of administrative resources.

tana de zulueta is the head of the limited election observation mission. we also noted a significant imbalance in the campaign, due among other things to the active involvement of the president, several leading national officials and many local public officials in the yes campaign. our team observed the misuse of administrative resources and the obstruction of efforts by parties and civil society organisations supporting the no campaign. the campaign rhetoric was tarnished by some senior officials equating no supporters with terrorist sympathisers. in numerous cases, no sympathisers faced police interventions and violent scuffles at their events. these events contravene osc commitments, council of europe standards and other international obligations regarding freedom and equality in the campaign.

earlier, our correspondent in istanbul, selin girit, gave this update. the opposition challenging the vote, the governing party and president erdogan saying, let's move on. and the people, on the one hand, jubilant, chanting president erdogan's name and celebrating their victory, as they call it and, on the other, shouting and banging pots and pans in protest at what they call the rigging of the vote. it's very difficult to tell what might happen next. there have been criticisms from the international observers as well. they have said the referendum process took place on an uneven, not a level playing field. there were criticisms against the media. the media was labelled as biased towards the government.

there were criticisms towards state resources being used by the government and the president unevenly. campaign restrictions were criticised, and the high electoral board's decision to accept unstamped ballot papers as valid was regarded as a late procedural change that was seen as an obstruction and unlawful as well. so these are damning verdicts coming from international observers, which fall in line with what the opposition have been saying. they were saying that the no campaign wasn't treated as freely and fairly in the campaign going towards the referendum, and they weren't given enough voice on the airwaves. they now want the annulment of the referendum. the deputy leader of the main

opposition party wanted annulment, but the government says, let's move on. the headlines on bbc news: us vice president mike pence has warned north korea not to test the strength of the united states. prince harry has revealed he sought counselling, after spending nearly 20 years "not thinking" about the death of his mother. turkey's president erdogan has said he'll press ahead with sweeping new powers, after narrowly winning the constitutional referendum. sport now, and a full round—up from the bbc sport centre. world snooker chairman barry hearn says ronnie o'sullivan's accusations of intimidation and bullying directed at him are unfounded. the five—time world champion made the comments after his first round win

at the world snooker championship yesterday. this is is what hearn has had to say: so barry hearn not taking this lightly. these are the exact words from o'sullivan yesterday which prompted such a strong response. 25 years of service to this game. i think i have given enough to this game. i think think i have helped and done my bit. i don't need that. i don't need you and you probably don't need me. i just want to enjoy my life and i am not putting up with someone who feels they can bully me. ain't happening. to today's action then on this, the third day of the championship. the afternoon session at the crucible is under way and shaun murphy, who won this title 12 years ago now,

is leading in his first round match against yan bingtao of china, who's just 17. he is leading 8—5. these are live pictures. this isjohn this is john higgins this isjohn higgins against martin gould. john higgins is a fourth frame lead, nearly. you can follow this match live on bbc two and via the bbc sport website. earlier the 2015 champion stuart bingham secured his place in the second round, beating another former winner, peter ebdon. he was leading 5—4 coming into this morning's session, but won all but one frame today for a comfortable win in the end — by 10 frames to 5. he'll face kyran wilson next. it's a crucial day in the championship — brighton could be all but promoted to the premier league today. they‘ re playing wigan. they're leading 1—0. they need to better huddersfield's result against derby — that's a 5pm kick—off. premier league survival

and champions league qualification are at stake when middlesbrough take on arsenal at the riverside tonight. the hosts are six points from safety, while arsene wenger‘s side go into the game in seventh. he's responded to criticism that his players lack character. these players are that level because they have the character, but under difficult circumstances, confidence can drop and can be a bit contagious, you know. and therefore it's important. the energy in the tea m it's important. the energy in the team can change in three days. it can come back as well very quickly. we had a good game against west ham. five days later, we had a bad game at crystal palace. it can come back quickly and we have to focus on that. manchester city's women beat

liverpool ladies 1—0 in their semifinal of the women's fa cup. kyle edmund has beaten his davis cup teammate dan evans in straight sets in the first round of the monte carlo masters. andy murray, who plays his first round match on wednesday, was courtside to watch the british number two and three in action. it's the first time the pair have met on the atp tour. edmund recovered from a slow start to take the first set 7—5. he's ranked one place below evans at 45 in the world, but eased through the second set 6—1, to set up a second round match against nine—time monte carlo champion rafa nadal. that's all sport for now. i'll have more in the next hour. at least 12 people have suffered burns after a suspected acid attack

at a nightclub in london. around 600 people were at the venue in hackney, which had to be evacuated. our reporter sarah corker is outside the club. it was just after 1am this morning when police say acid was sprayed inside this club in east london. we do know that emergency services sent down a hazard response unit. the fire brigade were also there. as you say, 12 people were injured and later treated in hospital. two men, both in their 20s, are in a serious but stable condition and others have been treated for minor burns. the metropolitan police have said they believe there was some kind of dispute between two groups of people. that resulted in one man throwing acid directly at another. 600 people were in the club at the time. it was evacuated. roads in the area were closed off. witnesses have described some scary scenes, in their words. they said they saw people pouring water over one person. police have said they haven't yet identified what this substance was,

but they did do a ph paper test which showed it was strongly acidic. there was one officer here earlier in a protective suit, taking pictures and collecting evidence. police have said there have been no arrests but there was nothing to suggest this was gang—related. they have asked anyone for any information about what happened here to contact hackney cid on the 101 number. police in the us state of ohio are hunting a man suspected of posting a video on social media of him fatally shooting a stranger. officers in the city of cleveland say the suspect steve stephens claimed to have killed 12 other people in a later video on facebook, but the city's police chief said they did not know of any other victims. james waterhouse has this report.

speaking on his phone in his car, this is the moment 37—year—old steve stephens makes an extraordinary confession. ijust snapped. i just snapped, dog. ijust killed 13 people, man. that's what i did. i killed 13 people. just moments earlier, he'd approached an elderly man, picked completely at random, and shot him dead. he later posted footage of the violent killing on facebook. his victim, 74—year—old robert goodwin. reports say he'd just finished an easter meal with his family and he was walking home when he was killed. visibly distraught, this is his son and daughter's reaction. this man right here was a good man. ijust hate... i hate he's gone. stephens appears in the video to confess to multiple killings. cleveland police, though, say so far they're only aware of one death. he had no criminal record.

he did have a lot of motor vehicle violations, traffic violations, but no criminal record to speak of. this isn't the first time a fatal shooting has been posted or streamed on facebook. lastjune a man was shot dead while live streaming a video of himself in chicago. a spokesman for facebook, which has removed the post, said it was a horrific crime and the policy was to contact the police when there were direct threats to physical safety. police are warning that steve stephens is armed and dangerous and the fbi have nowjoined the hunt for him. this year alone, 1.2 million tonnes of raw sewage has been dumped into the river thames because london's victorian sewers can't cope. but work has now started on a new super—sewer that's big enough to deal with the growing population of the city — as our correspondent richard westcott found out.

around once a week, the river thames becomes a toilet. thousands of tonnes of raw sewage are flushed into the water because the old victorian sewers can't cope. here we go. we all use them, don't we? now, i don't quite know what i'm going to find down here. i've got a fair idea. designed in the 1860s by engineerjoseph bazalgette, these sewers saved countless lives by helping to stop the spread of cholera. this whole area is like the overflow on your sink but on a massive scale. when it rains, all the rainwater and the sewage comes down here and out into the river thames. joseph bazalgette built the sewers to cope with 4 million people. 8 million people live in london today. it means just a couple of millimetres of rain is enough to swamp the sewers. i'm trying not to look down,

for obvious reasons, but talk me through it. when it rains a lot in london, does this tunnel just fill up? this tunnel will be absolutely full. there is no treatment. it's gone straight from a shower or a toilet and goes straight through here, straight into the river, but the quantity is up to 50 tonnes per second so it is really high volumes. huge amounts. i'm getting in my head a scene from a film with the water and everything else coming piling down towards us and out of the river. absolutely. this is not somewhere you want to be in any kind of storm event. so now they have begun building a new super sewer. there's not much to see yet but that circle will eventually become one of many shafts. huge tunnelling machines will be lowered down to bore out a 16—mile sewer under the thames. instead of sewage going into the river, it will go along the new tunnel. the scheme costs £4.2 billion. thames water customers will see

bills go up for years to help foot the cost. critics say it is too big and too expensive, denied by the boss. there are now 8 million people in london and we are talking about 11, 12, goodness knows what, in the next decade, so i think i would put it the other way — that if we did half the job now and then found in 20, 30 years that that wasn't enough, that wouldn't look like a clever decision. the super sewer will not be finished for seven years and by that time, a quarter of a billion tonnes of raw sewage will have been dumped into the thames. we've got to go out now because the tide is coming in and at high tide, this tunnel gets full. let's cross the newsroom and have a weather forecast.

the tone in your voice! i'll never look at the river thames the same way again. oh, dear. the weather has been not so bad today. there has been not so bad today. there has been some sunshine around, but there's also been a bit of snow, but only in the shetland islands, way towards the north of the british isles. some frost around as well tonight, pretty sharp in rural areas. in the glens of scotland, some frost. further south, areas. in the glens of scotland, some frost. furthersouth, not areas. in the glens of scotland, some frost. further south, not so frosty. a few showers working their way down through the night through eastern areas, but then it's a starry night. these are the temperatures in the middle of town. outside towns, could be 5 degrees lower. the weather tomorrow, a beautiful day on the way across most of the uk. hazy skies across the north—west, maybe some spots of rain. light rain in the hebrides and western isles. the week ahead, not

much rain on the way. high pressure will be in charge. warmer by day, but the nights will remain on the frosty side, but this is mostly out of time, —— out of town, probably not in city centres. hello. this is bbc news. the headlines: us vice president mike pence tells north korea neither the united states nor south korea would tolerate further missile and nuclear tests. the era of strategic patience is over. prince harry reveals he's had counselling, after spending nearly 20 years not thinking about his mother's death. turkey's president erdogan has said he'll press ahead with new sweeping powers, after narrowly winning the constitutional referendum. police are investigating an incident in which acid was sprayed inside a london nightclub in the early hours of this morning.