this is bbc news. the headlines at six: counting is nearly over in turkey's bitterly—fought referendum on increasing the president's powers. partial results suggest the yes vote has a slight lead. we will be live in istanbul shortly. the us says china agrees that north korea's threatening behaviour can't continue after the country's failed missile test earlier today. theresa may urges unity over brexit, as she delivers her first easter message as prime minister. our shared interests, our shared ambitions, and above all, our shared values can and must bring us together. also in the next hour: renovation work near lambeth palace leads to an historical discovery. builders find the tombs of five former archbishops of canterbury in a hidden chamber beneath church foundations. the premier league title race hots up as manchester united put two

goals past league leaders chelsea who remain four points above spurs. good evening and welcome to bbc news. president trump's national security advisor has said an international consensus against what he called north korea's threatening behaviour now includes china. hr mcmaster said the united states was working with its allies and with the chinese leadership to develop a range of options in response to what he described as a "pattern of destabilising behaviour". earlier in the day, the us vice—president, mike pence, arrived in seouljust hours after a failed missile test by the north. from seoul, stephen evans sent this report. the american vice—president visited south korea's national cemetery,

where the names of 104,000 soldiers, who died fighting north korea nearly 70 years ago, are listed. mr pence knows this history because his father served in that war. his big message now, the alliance remains. this morning's provocation from the north is just the latest reminder of the risks each one of you face every day in the defence of the freedom of the people of south korea, and the defence of america in this part of the world. he landed a day after a fearsome display of weaponry, 100 miles to the north, in pyongyang. but as though to undermine that image, north korea today tried and failed to fire off a missile. us officials said the launch came from the sinpo region, the second such launch from land in that area, which also has a submarine base.

talk of war is now ramping up. it's not clear, though, if mr trump has decided on attacking north korean nuclear facilities. south koreans are watching developments closely. 25 million south koreans live within range of north korean artillery. all the same, south koreans tend to assume war will not happen. life goes on. all mr trump's predecessors, from clinton onwards, have contemplated military action. mr clinton contemplated bombing north korea's nuclear facilities and pulled back, because the threat of retaliation would probably bring on a second korean war. mr trump may or may not be like the presidents before him. he says he's not. in a complex situation of great danger, he is the new unknown factor. his attitude to risk and military action is hard to gauge. stephen evans, bbc news, seoul.

0ur correspondentjohn sudworth is in the north korean capital, pyongyang, and earlier gave us his assessment of the situation. his movements are being monitored and tightly controlled. in many regards this is business as usual for north korea, it has long used brinkmanship and tension to up the ante and then win diplomatic and economic concessions as it steps back from the brink. but with each cycle moving one step closer towards its goal of becoming a fully fledged nuclear power. what is new in all this is not what is happening in this capital but in washington. it seems that north korea's actions suggest that it is confident that president donald trump will, like his predecessors before him, eventually conclude that the cost of military action is simply too great. john sudworth in pyongyang.

68 children are believed to be among those who died in yesterday's suicide bomb attack in syria. a convoy of coaches was carrying evacuees in a pre—arranged exchange between the syrian government and some rebel groups when the car bomb exploded. activists say more than 120 people were killed. the blast, on the outskirts of aleppo, tore through coaches that had left two pro—government towns surrounded by rebels. the iraqi military says that in fierce fighting with islamic state militants its forces have pushed deeper into the heart of the city of mosul. after weeks of near stalemate, troops and police launched an attack in the area of the old city, which has been an is bastion. the government forces say they managed to advance some 200 metres. the difficulty for government forces has been the area's narrow streets which often makes it impossible to deploy tanks and armoured vehicles. let's should use some live scenes

from turkey. 0f let's should use some live scenes from turkey. of course, we are very, very close to an official declaration on the result of that referendum which will determine the amount of power that the president, president erdogan, as it stands, will enjoy in the future. the figures you can see in the picture are awaiting an official results. the latest ice of various —— through various wire copies was that with nearly all of the votes counted, the lead for the yes campaign was 57.1%, as opposed to 47.3%. that, what you are now seeing in short, is the residence of president erdogan in ankara. certainly another view of that short would indicate that there are quitea

that short would indicate that there are quite a lot of people gathering outside that particular building, with various people wanting to celebrate the fact that there has been a yes vote because that is clearly where president erdogan was encouraging people to cast their votes. we a re encouraging people to cast their votes. we are expecting a statement from the prime minister, mr yielder ream. that is coming up injust about under one are‘s time. the prime minister's offers making that announcement. we have got to the point where about 95% of ballot boxes have been opened, that is according to one of the state—run news agencies. in some of the big cities, the three largest cities, including istanbul and ankara, the no votes were in the lead, but the wider picture suggests a narrow vote at the moment, still in favour of yes. let's bring in salim guerin.

she is therefore is in istanbul. what is the picture as far as you seeit? well, the official state news agency has been reporting that over 97% of the ballot boxes have been opened, and the latest numbers are, the yes campaign stands at 51.4, and no stands at 48.6. if the official results are like this, then the turkish nation will have said yes to the proposed constitutional changes. what will happen then? president recep tayyip erdogan will have enhanced executive powers, the parliamentary system in this country will be replaced by a presidential system. the president will be able to appoint his vice president, top judges, he will be able to draft the budget, he will be able to dismiss the parliament, he will have

extensive powers. the post of prime minister will be abolished. the no campaigners were saying that if these proposed constitutional changes went through, there was a risk that this country would fall into an authoritarian rule. if the result is as it stands at the moment, if the official results suggest that there will be a victory of the yes campaign, it will mean that the nation has spoken, and they wa nt that the nation has spoken, and they want what no campaigners were calling one—man rule. if it was a yes vote, it would be comparatively narrow. does that has any bearing on what might emerge in the near future? well, 50.1%, even 50.1% will be enough for the yes campaign to have these constitutional changes go through. 0nly these constitutional changes go through. only an absolute majority is needed for the constitutional changes to go through. of course, there is that question of

legitimacy. half of the nation will have said no to these constitutional changes. will president recep tayyip erdogan and the government and the yes campaign consigli, make concessions towards the no photos, the words that half of the country. we do not know. in one are‘s time, the prime minister will take to the stage to speak to the nation. we do not know if you will be claiming victory in that speech. if he does, we would expect president recep tayyip erdogan to do the same. he traditionally gives a balcony speech where he speaks in a conciliatory tone. remember, the president has been a very polarising figure in this country, and this referendum, the campaign leading to the referendum has been very polarising as well. half of the nation is supporting, the other half

is against. if these constitutional changes go through, will there be more trouble ahead for turkey? the government was saying that if yes wins, there will be stability. if it wins with a narrow margin, will there be stability? that is the question. the variation around the country, regionally, in terms of which parts of the country, big cities rural areas, the different views that people in different parts of turkey are taking on this? yes, traditionally the western coast of turkey is more secular and more modern and liberal. in this referendum they have voted predominantly no. in the big cities, istanbul has voted no. that is a surprise. the no votes are leading. in ankara, the no campaign is leading with a narrow margin. those two cities have voted in the past for the governing party in the majority, for their campaigns. in the south—east, where there are

predominantly kurdish citizens living, they have voted in general no. they feel like they are being underrepresented, and bid in maine this referendum has been taking place while the pro—kurdish party, over a dozen mps, including their co—leaders, or in prison. the kurdish citizens feel their voices not heard in the parliament, in the campaign, nowhere. they have voted no predominantly. the no campaign was saying this was not a legitimate race, they were not given enough voice, they were not given enough coverage 01’ voice, they were not given enough coverage or air time. the yes campaign had the air time and the reason nurses. they used very comprehensively resources in comparison to no campaign. they were saying that turkey is holding this

referendum under the state of emergency. and there are already questions about legitimacy, and if there is such a narrow margin, legitimacy of this referendum will be the main words that will keep p°ppin9 be the main words that will keep p°pping up- indeed. thank you so much for the time being. you can see the figures at the bottom of the screen. at the moment, 51.4%, yes, 97% of ballots counted. confirmation of that in due course. let's catch up with the sport. the premier league title race could be back on. league leaders chelsea look to be heading to defeat against manchester united at old trafford. there are six matches left to play. united went ahead within seven minutes when marcus rashford raced clear to open the scoring. and united added a second immediately

after the break, ander herrera's shot deflecting in. 2—0, the final score. united up to fifth, result that gives a big boost in making it into one of the champions league qualifying places. liverpool strengthened their acclaim in a champions league spot with a hard—fought 1—0 victory against west bromwich albion. roberto firmino with the only goal of the game in first—half injury time. liverpool now sit third in the table. a controversial late penalty and ross county a precious point against celtic in the scottish premiership. with the score level at 1—1, patrick roberts put the champions ahead in the 78th minute. then the dramatic finale in dingwall. the hosts and the penalty after this challenge. there appeared to be no contact. cou nty level, there appeared to be no contact. county level, and shortly afterwards, celtic captain scott brown sent off for a lunge on boys. he is likely to miss the scottish

cup semifinal against rangers next week with celtic chasing a domestic treble. sebastian vettel has won the bahrain grand prix in his ferrari with lewis hamilton second. further evidence that mercedes' recent domination is going to be severely tested this season. the german started from third behind the two mercedes, but ferrari's smarter tyre strategy saw vettel claim the chequered flag for his second win of the season. it moves him seven points clear of hamilton in the drivers' championship. valtteri bottas was third in the other mercedes. bristol have been relegated from the aviva premiership with two rounds still to play after they lost 36—21 at home to wasps. that bonus point win for wasps means they've secured themselves a home tie in the semi—finals. today's other match was a thriller. saracens came back in the final few minutes to sneak a win at northampton saints — 27—25 the final score. ronnie 0'sullivan is through to the second round of the world snooker championship. the five—time world champion started the afternoon session leading gary wilson 5—4.

he moved onto 7—5 with this break of 124 — the highest of the tournament so far. wilson did pull two frames back but 0'sullivan is safely through to the next round 10 frames to 7. great britain have finished joint fourth in the medals table at cycling's world track championships. having already won two silvers in hong kong, elinor barker went one better, taking gold in the points race after a gripping battle with america's sarah hammer. it was britain's fifth medal and second gold in the five—day competition, following katie archibald's omnium success on friday. and that is all your sport for now. the headlines on bbc news: donald trump's top security adviser says the us and china are working on a "range of options" on north korea after the country's failed missile test. votes are being counted following turkey's controversial

referendum on constitutional change — with partial results suggesting the yes vote has a slight lead. in her first easter message as prime minister, theresa may has spoken of a "sense of people coming together" after the brexit vote. more now on the referendum in turkey. the yes vote currently has a narrow lead, but the result has tightened as more ballot boxes have been opened. a yes vote would give president erdogan the ability to make sweeping constitutional changes. let's get the latest from mark lowen, who is in ankara for us now. how does it look? it is very tight. let me give you the updated results. the yes side supporting the constitutional change is at 51.28%. the no side at 48.72%. that is with

about 98% of the ballot box is opened. there arejust about 98% of the ballot box is opened. there are just over a million votes between them. in a country with 55 million eligible voters, that is not a lot. let me show you the scene behind me. this is the governing party headquarters in ankara. you can see the flag of the yes side hanging over it with the yes side hanging over it with the face of the prime minister, who may turn out to be turkey's last prime minister. and the music is blaring out. they think they have clinched it and supporters are beginning to stream into the party headquarters, which is where president erdogan would make an a cce pta nce president erdogan would make an acceptance speech if he wins. it looks as if it is going his way, but there are still some ballot boxes to open. it will be hard for the no side to pull it back, but not out of the question. if it is a very narrow yes, does that alter the way this might pan out? well, it is not the resounding victory that president erdogan wanted when he called this referendum. the failed coup of last

year gave him the final push towards the referendum. back then, his support was extremely high at about 70%. so he thought he could ride that wave of popularity and secure a resounding mandate for this change, but he has not. it is much closer. a victory is still victory, but half the country will feel completely defeated and half of the country will feeljubilant. defeated and half of the country will feel jubilant. it will defeated and half of the country will feeljubilant. it will be up to president erdogan to heal wounds here and to try to rebuild bridges abroad. it has been an extremely bitter campaign. you will remember how he labelled dutch and german leaders nazis and fascists, hitting out at the west to secure the nationalist vote here. there will be anger in the west at that and there will be pressure on president erdogan to try to rebuild those bridges after this referendum campaign. i am just bridges after this referendum campaign. i amjust reading a reuters line quoting the deputy chairman of the main opposition party, demanding a recount of up to 60% of the votes. are many people

questioning elements of the way this has been conducted ? questioning elements of the way this has been conducted? there are questions on the voting process, with some reports of irregularities, one which emerged in the last few hours. the supreme board of elections said they would not discount ballot slips that have not been officially stamped unless they can be proven to have come from outside. that was one problem. there is also a huge amount of anger at the way the campaign was led, given the way the campaign was led, given the fact that the no side was drowned out in the media and on billboards and posters. 0ne ratio from pollsters suggested that the ratio of yes side to no side in the media coverage was ten to one. that isa sign media coverage was ten to one. that is a sign of how one—sided the campaign was. given that, it is extraordinary that it is so tight. but if it is victory, president erdogan will say he has a mandate and this country will have the biggest political change in its

modern history. you are in the capital and we have heard from istanbul. if you look at some of the west coast cities, they are tending to vote no to a degree. how does it break down when you look across a map of turkey? it is an interesting question. the three biggest cities, istanbul, and grand izmir, voted no. izmir was always going to vote no. 0ther izmir was always going to vote no. other cities also voted no. the core of the erdogan vote is the more pious, more conservative anatolian turks in the centre and east of the country. they are the ones who won infor him. country. they are the ones who won in for him. and also the turks living in germany support him. they we re living in germany support him. they were the old guest workers from the 60s who went over to germany. but the ones who vote against him, who almost can't say his name without

spitting, the secularists who fear that turkey is sliding into a dictatorship and the other turkey should still be passionately pro—european. that is this bit of modern turkey, the split of this polarising president, a split that has become even more accentuated tonight. testing children in primary schools has been on the agenda at the national union of teachers‘ annual conference in cardiff today. there was a heated debate among delegates, in which teachers criticised the way younger pupils are tested. delegates at the nut conference will vote tomorrow on whether to boycott the tests. 0ur education correspondent gillian hargreaves is at the conference. she told us that many speakers criticised the current model of testing children. there was delegate after delegate after delegate this morning, saying how irritated they were by the testing regime in england's primary schools. one said the government is test obsessed. another said sats tests at the age of 11 are akin to a monster stalking our schools. the reason why the government has

testing at the age of 11 is to monitor pupils‘ progress before they go into secondary school. the government would say without testing, you can't make sure children have reached a record level to compete with other pupils across the world, and you can'tjudge how good primary schools are. so testing at 11 will almost certainly stay. but the opposition to testing in primary schools is such that the government has said it will look again at testing younger children. at the moment, six and seven—year—olds also undergo formal testing. the government has effectively established a moratorium on that until they can consult with teachers about what might be the best way forward. there were so many delegates talking this morning about primary testing. they haven't actually yet had a vote on whether they are going to boycott sats tests. that will happen tomorrow. this being easter sunday, what normally happens is that the nut breaks for the rest of the day, so there won't be any more debates this afternoon, so we won't find out when that

boycott will happen or if it will happen until tomorrow. but given the flavour of the comment this morning, it is almost certainly inevitable that teachers will vote to boycott them. they will not affect sats tests being sat in the next ten days or so. those will go ahead as normal. if there is any boycott, it will affect the testing regime next year. and they will hope they may lead to talks with the government that might see a change of heart? yes, i think there is some wiggle room on this, because the government is looking at the testing regime in primary schools. it's already said it is minded to find another way to test progress for the youngest children. as i say, there are formal tests at the moment for six and seven—year—olds, and the government is minded to get rid of those, it says, but that is open for consultation at the moment. so it will be interesting to see what the union's position now is. last year, there were boycotts of tests. some parents took their children out

of school for the day and did other things with them. so there is a groundswell of opinion on how much children are tested in primary school. but as i say, the government says some sort of benchmark has to take place so you can see how well they are performing and how good their schools are. theresa may has used her first easter message as prime minister to say the uk is coming together after the brexit vote. the prime minister said opportunities would emerge from britain's decision to leave the european union, thanks to the country's shared ambitions and values. she also stressed her belief in the importance of religious tolerance and freedom of speech. let us come together as a nation, confident in our values and united in our commitment to fulfil the obligations that we have to one another. let us work together to build that brighter future that we want for our country.

and let us together build a stronger, fairer britain that truly does work for everyone. the labour leaderjeremy corbyn used his easter message to urge people not to stand by in the face of society's problems. the labour leaderjeremy corbyn used his easter message to urge on the current challenges, both at home and abroad. it would be easy to retreat into our private lives because the challenges seem overwhelming, or allow ourselves to be divided and blame others. but we need to respond to these problems head on through action and support for social justice, peace and reconciliation. the government has announced it is doubling its funding to fight neglected tropical diseases, which affect more than one billion people in the world's poorest countries. £360 million will be given over the next four years to combat illnesses including river blindness, trachoma and guinea—worm. the issue's being discussed at an international conference in geneva next week. the department for international

development said the uk's support would protect more than 200 million people from a future blighted by tropical disease. the tombs of five former archbishops of canterbury have been unearthed by builders undertaking refurbishment work near lambeth palace. the builders were levelling the floor of a nearby church when they accidentally cut into the foundations and discovered a hidden chamber. inside they found 30 coffins, with an archbishop's mitre resting on one of them. closer inspection revealed metal plates bearing the names of five former archbishops of canterbury, dating back to the early 17th century. christopher woodward, director of the garden museum development project, which is refurbishing the church, spoke to me a little earlier about the moment he was told of the discovery. we didn't quite know what to do with this great pile of coffins and we wanted to leave them in peace, really. we are doing this transformation of an old medieval church

into a museum, a deconsecrated church, and the builder rang and said to come quickly. i arrived thinking, there's going to be bones or some terrible hole, and they said they found a golden crown and, looking through the hole under the chancel, you could see the mitre glimmering in the dark. it's an 18th—century replica of what the archbishop would have worn, made to be placed on the coffin at an archbishop's funeral, and there seemed to be about five archbishops among about 30 coffins in this vault. and nobody knew that they were there? we knew they had been buried there, but the church had been rebuilt from top to bottom and other people's remains, like anne boleyn's mother, had vanished. it was the builders just moving aside this slab and looking down and seeing these brick steps. put the discovery into some context for us, in terms of its historical significance.

the archbishops have since the 16th century been the primates of a world church. one of them is particularly famous, archbishop bancroft, appointed by king james i to put together the king james's bible, an astonishing piece of work from the 17th century where they had to put together a bible with 47 writers. even though he didn't write it, it's the words that he forced into print which ring out across thousands of churches today, it is those words you hear if you are going past a church. what happens now? we don't know, it's all new. we sent down an endoscope to try and read all of the words in the dark. we think we are going to try and leave it where it is, because they are dead and they deserve to be left there, but visitors to the museum next month will get a glimpse of these

steps leading into the dark and perhaps one day, we will do some more investigation. i mentioned refurbishment work going on. does that have to wait now? no, it sits on top of it. it is all... basically, we built the new building like a modern museum popping up inside an ancient church, so it all sits above it, but you look down on this flight of steps leading into the darkness, but you would need a giraffe's neck to see the archbishop's mitre. let's check on the weather prospects. good evening. if you got stuck with cloud can drain this easter sunday, hopefully we can promise you something brighter tomorrow for easter monday. some of