this is bbc news, i'm shaun ley. the headlines at eleven. iran seizes a british—flagged oil tanker in the gulf, the uk government says there'll be serious consequences if it isn't released. we will respond in a way that is considered but robust. we are absolutely clear that if this situation is not resolved quickly, there will be serious consequences. a warning from the chairman of the high speed 2 rail project, its cost could rise by £30 billion. hackers target the metropolitan police's twitter feed and post a series of bizarre messages. it's 50 years ago today that neil armstrong took the giant leap to become the first man to walk

on the moon. and coming up in dateline london — carrie gracie and her panel of guests discuss escalating tensions with iran and who'll be the next prime minister. that's at half past 11. the foreign secretary, jeremy hunt, has warned tehran of serious consequences after the iranian revolutionary guard seized a british—flagged oil tanker in the gulf last night. the government has advised uk ships to "stay out of the area" of the strait of hormuz for an "interim period", after a meeting of the emergency committee, cobra, late last night. state media in teheran say the tanker, the stena impero, had violated international maritime rules.

but the ship's owner, the swedish company stena bulkt says the tanker was in "full compliance with all navigation and international regulations. " the foreign secretary, jeremy hunt, said the seizure was unacceptable and britain's response would be "considered but robust". our correspondent simonjones reports. seized in a major escalation of tensions, the stena impero, a british flagged tanker and its 23 crew members from india, russia, latvia and the philippines now in the hands of iran after it was surrounded by four boats and a helicopter. this is completely unacceptable. freedom of navigation must be maintained. we will respond in a way that is considered but robust. and we are absolutely clear that if this situation is not resolved quickly, there will be serious consequences. the tanker was tracked leaving the united arab emirates, heading north, staying well inside the international waters of the gulf.

but just after three o'clock yesterday afternoon, the 30,000 tonne vessel makes an abrupt change of course, its last known movement inside iranian waters. an announcement on iranian tv claimed the tanker had failed to respect international maritime rules. its british operator says that's not true. london is now urging uk ships to stay out of the area for the time being. there is no alternative route in and out of the gulf, so if this is to endure then clearly it's going to impact on our trade routes, trading patterns and ultimately the price of those goods. the us president is rallying to britain's support. we have a lot of ships there that are warships and we'll talk to the uk and we have no written agreement, but we have an agreement. they've been a very great ally of ours. a second british—owned tanker, the mesdar, was boarded by armed

guards, but has now been allowed to continue on its journey. iran's actions are believed to be in response to this, the royal marines helping to seize an iranian supertanker off the coast of gibraltar earlier this month. britain believed it was smuggling oil to syria in violation of eu sanctions. tehran accused london of piracy. a meeting of the government's emergency committee, cobra, went on late into the night. the big question now — who will make the next move? our correspondent katherine da costa is outside the foreign office. since the foreign secretary spoke to campus late last night after that meeting, he has put out another statement. it seems to be slightly tougher in its message? yes, clearly relations are deteriorating between iran, the us and the uk. in a statement put out this money by the

foreign office and says ministers met in cobra to discuss the incidents. as the foreign secretary has said are responsible be considered, but robust. there will be further meetings of the weekend. jeremy hunt has tweeted this morning saying yesterday's actions in the gulf should wording signs... he added reaction will be considered, but robust. we have been trying to find a way to resolve grace one issue, but we will ensure the safety of our shipping. iran's ta ke the safety of our shipping. iran's take on this incident is that the tanker collided with an uranium

fishing ship and failed to respond to calls from that smaller boat. it has been taking tea and iranians port, all 23 crew members are on board and will remain so. the vesser board and will remain so. the vessel's owner said it was complying with regulations and was in international waters at the time. what about the international reaction? presumably britain's relations with iran apparently determined by the position the european union takes? yes, well, it will be clear that tensions flared earlier this month. that was caused by the royal marines seizing and iranians tanker, iran responded accusing britain of piracy and threatened to retaliate. a week later, iran tried to impound british tanker. that was stopped by the royal navy. iran has also hurt from cathy and sanctions. it may feel it

has nothing to lose. the us is trying to bring about an international coalition to condemn the situation and so far both france and germany have called on iran to release the british tanker immediately. thank you very much. lets speak now to the conservative mp and chairman of the foreign affairs select committe, tom tugendhat. what is your take on the situation and the prospects of de—escalation? i think this is extremely concerning. what we are seeing tested is fundamentally the system of rules that have kept us safe and prosperous for the best part of seven years. this is admittedly a british tanker that has been taken, but it could have been from any nation. the crew, we must stand together with our friends to make sure we resolve this issue as soon as possible. in a sense it is less that it as possible. in a sense it is less thatitis as possible. in a sense it is less that it is a british flight vessel, because in some ways that is a sort of convenience thing, isn't it? it

is more that the potential challenge represents differing movement of shipping through one of the most important links for commerce on the planet? that is exactly right. for 200 years or so the royal navy kept the sea lanes open, for much of the past 70 years other countries have pledged their part, do. now it is time that the entire international community steps up, as well. a lot of the energy, invite most of the energy, leaving is turning east not west, going to india and china where their growing economy demands more energy. this is really a test of the syste m energy. this is really a test of the system that we have built up and are i'iow system that we have built up and are now showing some anymore. that is white is important that french and german governments have quite rightly come out in support of the uk forto rightly come out in support of the uk for to date is the uk, tomorrow it could be somebody else. the reason royal marines sees that iranian ship is not because the british government wanted it, but because the international community demanded it. we have strict

sanctions are not allowing resources or indeed field to get the regime in syria. and to perpetuate that vicious war. in terms of iran's reaction to that seizure of the ship by gibraltar coast guard? their argument is that that effectively has interdicted the free movement of a vessel. yes, it may be eu sanctions, but they are not new and security council sanctions and therefore they are going to ignore them and they argue why should they comply a view of certain number of countries that oil should not be supplied to syria? it is a resume after a ll supplied to syria? it is a resume after all that is recognised by a lot of countries. look, there is no question about recognise the resume. however, there is a long—standing international principle that you do not port fuel on a fire. 0ne international principle that you do not port fuel on a fire. one of the things we do know about syria is that it things we do know about syria is thatitis things we do know about syria is that it is a very vicious civil war, a congregation in many ways stirred

up a congregation in many ways stirred up by a congregation in many ways stirred up by the iranians revolutionaries, the same group that has seized a british vessel and taken it to the airport. although you are right these are eu sanctions, they are an expression of an international desire to stop a civil war in syria that has seen tens of millions of people fleeing their homes, many of them internally displaced, but an off a lot of the externally displaced causing refugee crisis in countries like lebanon, jordan, iraq and turkey. not to mention any european country. 0ther and turkey. not to mention any european country. other we are right, this is a european union sanction and one that we were instrumental in ensuring was put in place, this is actually about upholding the international order. if we do not do it, then we are going to prove the old line that politics is simply history for slow learners. that is a good and powerful way of putting it. i suppose the danger and fear some people have is the kind of learner of unintended consequences imply to

situation like this. if iran are simply testing us, were going for us because it is easier than going for america and less risky from his point of view, isn't there a danger that even by the response we risk the kind of... that is potentially more serious and more damaging and more serious and more damaging and more likely to lead to conflict in a highly combustible part of the world ? highly combustible part of the world? that is an extremely reasonable point. the truth is the iranians revolutionaries are is already now encouraging violent revolution and murder in israel, syria, lebanon, jordan, iraq, bahrain, yemen, i can go on if you like. so, talking about confrontation, let us not pretend there is not an awful lot of violence coming from that regime today. now, i violence coming from that regime today. now, lam not arguing in a nyway today. now, lam not arguing in anyway for a military response

actually moment comments are a military response to the teasing of this vessel. but i think we need to be very clear that the lessons of history are absolutely obvious, they are that if we allow ourselves to be bullied by iraq then it leads to other examples. —— village by iran. whether it is standing up for ambassadors or indeed making sure that our ships are not taken, we need to be absolutely robust. because weaknessjust need to be absolutely robust. because weakness just encourages violence against us. many thanks. let's cross over to folkestone now where we can speak to the former head of the royal navy, admiral lord west. lord west, good morning to you. what do you think a mode be most effectively done to protect notjust british shipping but other commercial shipping through the

straits and is potentially very dangerous excavation?” straits and is potentially very dangerous excavation? i think we have got the situation now where we have got the situation now where we have to convoy merchant ships. i am very surprised that although we issued a warning to our merchant ships that this was a dangerous area and that they should not go there, that we did not, sort of, take the normal procedures for control of merchant shipping. take charge of british merchant ships and say right, you are not to move right up to the gulf, you're too anger off somewhere else and wait until the group of them. then we could have squirted them through, to allow ships to go up when we knew the iranians wanted to take a hostage is extraordinary. it is hardly surprising, they said they would do it. several times they said they we re it. several times they said they were dirt and lo and behold they have done it. now we have got this very difficult situation. presuming we are in more difficult situation than now, because they have proved

that they had the capacity to do this. we have to do something to remove the threat without actually a direct confrontation? ya, clearly we wa nt direct confrontation? ya, clearly we want to de—escalate. i mean, nobody wants a war in that region. but ds collating does not mean that you do not do the first duty of a government which is protecting its assets and its people globally as well as at home. therefore, we need to ensure we are looking after british like merchant shipping. it seems to me we had taken a couple of very silly decisions about that. look into the future it is not ethical array to actually look after our ships. they should be able to go through those waters, it is very important we reinforce the aspect that they are allowed to go through those international waters and the way to do it safely, so we can stop the irc causing any problems, is to do it with a small convoy, one at a time with a worship looking after

them. ideally, with another worship, as well. we have duncan going out there, but actually i have to say, some three or four weeks ago i did say, look, maybe we should be moving our assets out towards that region without escalating it. the greatjoy of naval ships, they would then have been closer and we would be able to call them into look after our ships going through international waters and that is not escalator eight, i do not think. that is something that any nation should be able to do. lowered west, thank you. the chairman of the high speed 2 rail project has reportedly warned that its cost could rise by £30 billion. the financial times says allan cook has written to the department for transport, saying the project cannot be completed for the official budget of £56 billion. here's our transport correspondent, tom burridge. hs2 — a new high—speed line linking london, birmingham, manchester and leeds —

was already set to cost a hefty sum — £56 billion. and in recent months, there has been a growing acceptance at the company building hs2 that the project is likely to cost more. now, with work on the line between birmingham and london already under way, and £5 billion spent so far, a report saying hs2 could cost an extra £30 billion. according to the financial times, the chairman of hs2, who is carrying out a review of cost and schedule, has written to the government, warning the new rail line cannot be built within budget and could cost between £70—85 billion. the government says the new high—speed line is needed because the west coast main line between london, birmingham and manchester is already crowded. both the department for transport and hs2 said the review into the cost of the project was ongoing. they wouldn't comment

on this latest report, but it comes at a sensitive time. borisjohnson says he will carry out his own review if he becomes prime minister next week. he has said the project's costs are spiralling out of control. some say the high—speed line is vital to link the north of england to the midlands and to london. but many question whether it's value for money, and if it gets even more expensive, that case will be harder to make. i'm joined now by the rail analyst, christian wolmar. thank you very much for coming in to talk about this. we talk endlessly about hs two and infrastructure projects and costs. should we be surprised if this turns out to be the case? no, it has been expected that the estimate of 56 billion has stayed the same for several years, there has been lots of rumours about there has been lots of rumours about the property prices going up, about

the property prices going up, about the complexity of the scheme and all sorts of other aspects. of course we have seen crossrail magic go up from 15 to 17 billion pounds. the amount is quite surprising. i mean, tojump on 56 billion to maybe 75 to 85, thatis on 56 billion to maybe 75 to 85, that is serious bananas. it is a particular port in time, isn't it? me about to get a change of prime minister and if it is as protected boys minister and if it is as protected bostohnson minister and if it is as protected boys johnson taking charge minister and if it is as protected bostohnson taking charge next week, he is not known as an u nalloyed fa n week, he is not known as an unalloyed fan of hs2. in his constituency he is dead against it, it goes under expert and does not do any good. politically he quite likes, he is wetting and dwarfing as it were. the timing of this is rather interesting, isn't it? because why would we suddenly get this news coming through just as we

are getting a new prime minister who may or may not be in favour of the scheme? so, isomewhat may or may not be in favour of the scheme? so, i somewhat suspect that are going to be moves against it. 0ne are going to be moves against it. one of the interesting examples which was offered to me as a possible explanation for some of the cost overrun, is that it has been an enthusiasm by government to adopt almost every environmental standard that has been proposed and that some of them have had unintended consequences of the example i was offered with a commitment to be used 90% of the soil that is taken out. but they discovered that a lot of the soil was not a very high quality and they then had to add in other soil to make it strong enough to support the tracks. all these kinds of things have added to the costs kind of incremental little stops and try no, these things do. they agreed to ta ke try no, these things do. they agreed to take out a lot of the soil by barge and that proved to be much more expensive than to do it by rote. but, i mean, some of the excuses that have been offered like

unexpected ground conditions, well, ican unexpected ground conditions, well, i can tell you any project i have ever written about has had unexpected ground conditions. so, this is a project that is clearly in trouble. 0nce this is a project that is clearly in trouble. once they have got to do is actually look at their costs and say, you know, so far they have absolutely refused to do this. we have got a railway that is at the moment for hundred kilometres per hour, most high—speed lines around the world... it add a lot of cost in terms of maintenance, structure and it has to be straighter, less like civility. so, they have got to look at these things in the face of what isa at these things in the face of what is a new political situation. thanks by much. 50 years ago today neil armstrong and buzz aldrin became the first people to set foot on the moon. the module carrying the astronauts touched down on the lunar surface onjuly the twentieth, 1969. it was a moment that brought the world together — here's our science

correspondent pallab ghosh. this is apollo saturn launch control. we're still aiming towards our planned liftoff at the start of the lunar window, 9:32am eastern daylight. the saturn 5 rocket shimmers on launch pad a at the kennedy space center. as the dawn‘s early light fades, three astronauts get ready for a mission that will propel them, and the rest of humanity, into a new era. in their space suits, commander neil armstrong leads edwin "buzz" aldrin and mike collins into the spacecraft. three, two, one... we have liftoff. neil armstrong reporting the roll and pitch programme which puts apollo 11 on a proper heading. 0k, our flight controller's going to go for a landing. retro. go.

vital. go. guidance. go. neil armstrong takes manual control and with fuel running low, brings the spacecraft down. the eagle has landed. roger, tranquillity. we copy on the ground. you've got a bunch of guys about to turn blue. we're breathing again. thanks a lot. he then makes his descent onto the lunar surface. i'm going to step onto land now. and uttered the words that would reverberate through history forevermore. it's one small step for man, one giant leap for mankind. it was a time when all things seemed possible, the very stars seemed within our grasp, only for plans for the human exploration of other worlds to fade. but neil armstrong himself said that the dream was still there and it would come back in time.

sport and for a full round up, from the bbc sport centre, here's gavin ra mjaun. play is under way at the open championship in portrush, but there will be no rory mcilroy on the course today. the local favourite missed the cut by one shot. a fantastic 2nd round of six under and huge support from the crowd wasn't enough to make up for his disastrous first round on thursday. mcilroy — who won the open in 2014 — said he was disappointed not to be around for the weekend, but said he showed good resilience to fight back. probably one of the most fun rounds of golf i ever played. which is weird to say because i am packing my things and going home and it is only my second in the open championship. i always say the lowest point in my professional career was missing in 2013, this does not feel like that at all. there is still plenty

of home interest though at the top of the leaderboard. tommy fleetwood and lee westwood are just one shot behind thejb holmes and shane lowry of ireland. justin rose is on 6 under. brooks koepka is —5, hoping to add the open to his collection of 4 majors. the leaders go out at ten to four. full coverage on the bbc sport website and 5live. england are looking to make it through to the netball world cup final for the first time this afternoon. when they face new zealand in liverpool. 0ur reporter kate grey has already got her seat. yes, it is going to be a huge match for england today. hoping to make it through to their first ever netball world cup final. they are up against new zealand, but england have been faultless in this tournament so far. they have had six men spent six matches, most significantly they went against south africa on thursday. 0ne went against south africa on thursday. one of the inform teams, england almost made it look easy. very clinical commentators were well on form. coming into this match

against new zealand with great confidence. new zealand have beaten them in the last semifinal, they played at a world cup in 2015 but england have got the home crowd behind them, they have been brilliant to them all the way through the tournament so far. england will be hoping to make it through to the semifinal today. the first semifinal is going on right now, australia versus south africa. pretty neck and neck at the moment. iam pretty neck and neck at the moment. i am england will have one eye on that match at the moment. all about a video so far. liverpool has got a brilliant atmosphere. england are facing a battle to stay in this women's ashes series — australia began day 3 on 341—5. currently they are 355—6 having taken an early wicket today. elyse perry made a century. england are 6 points down in the multi—format series. having lost all one—day matches — this test is worth 4 points. but england need something special to get in this. all australia need is a draw here, to retain the ashes.

there are three more t20 matches to come. that's all the sport for now. now for the weather. hello, most places will get to see some sunshine at some stage of today, but there are further heavy showers to be had. there will be some thunderstorms, too. in western parts of the uk, we will be seeing some quieter weather edging in during the day. low pressure begins to pull away towards the north sea, bumping the isobars. brief rate of high pressure building into the west. dry into northern ireland and western scotland, it will be drying up. wales and parts of western england on through this afternoon eventually seeing fewer showers and more in the way of sunshine. the showers though this afternoon are still there for eastern scotland, north—east england, the midlands on towards east anglia and some back into the south—east. some of these will be heavy and thundery in places. most of us are around 18 to 22 degrees. 2a in other parts of the south—east. still quite breezy out there. breezy, but nothing worse than that at royal portrush for the open golf day three. broken cloud and sunshine, big,

big change tomorrow. waterproofs will be worn again. we get to that in a moment. this is how saturday finishes. evening showers will stage in the east and then mainly dry and clear overnight. the wind easing a touch, it is fresher and less humid. makes it easier for sleeping, temperatures overnight in the range of ten to 1a degrees. it takes us on to part two of the weekend. the day starts with a lot of sunshine, already the clouds moving back into northern ireland. it will not below before the rain comes from it. then, that leads to a wet afternoon here. the rain pushing across scotland towards north—east england and wales. the rest of england and wales the cloud will increase, but state mainly driver much of the day. temperatures nudging the mid—20s, just the teens where we have the rain. quite mainly with that and very wet for a time overnight sunday night and into monday. that pushing northwards during monday after

a cloudy site elsewhere. some sunny spells developing and the heat starting to build. it is a sign of things to come next week. heat returning to parts of continental europe, and we tap into some of that. scotland and northern ireland, the warm spot to be in the mid—20s. for england and wales it is 30 or above. becoming very hot for some of us, very humid, as well. it looks like a few days of fine weather across much of the uk before a gradual thundery breakdown coming in from the west as we go deeper into the week.

hello and welcome to dateline london. i'm carrie gracie. this week, in the fortnight since a tanker carrying iranian oil was seized off gibraltar, tehran repeatedly threatened

to retaliate by seizing a british tanker in the gulf. and then it did exactly that. so much for british hopes of de—escalation. it's a grave challenge for the world, but particularly for a new british prime minister. the uk changes leaders this week, with no sign of de—escalation at home either, as the brexit clock ticks down inexorably with no clear path out of crisis. my guests today, writer on arab affairs abdel bari atwan, michael goldfarb of the podcast frdh, stefanie bolzen of german newspaper die welt and political commentator yasmin alibhai brown. freedom of navigation is a fundamental principle of international law and no self—respecting government can ignore the seizure of its ships on the high seas. but us economic sanctions are choking iran, the nuclear deal