this is bbc news. i'm reeta chakrabarti. the headlines at 9am: scotland yard says the westminster attacker khalid masood acted alone and his motive may never be known. detectives confirmed the attack lasted just 82 seconds the family of murdered pc keith palmer have thanked those who fought to save his life and said they were grateful he was not alone. two people have been seriously injured and 32 others hurt following the collapse of several buildings after a suspected gas the pentagon admits us—led coalition aircraft did strike area of the iraqi city of mosul, where dozens of civilians were reportedly killed. also in the next hour, a thrilling start to the formula one season. sebastian vettel beats mercedes lewis hamilton in the first race of the formula one season in australia and our sunday morning edition of the papers is at 9.35am — this

mornings reviewers are journalist and broadcaster shyama perera and ian birrell, assistant editor at the mail on sunday. good morning and welcome to bbc news. police say they might never find out why khalid masood killed four people near the houses of parliament on wednesday. scotland yard now say they believe he was acting alone and that the attack was over within 82 seconds. the family of pc keith palmer who was killed by masood have released a statement, thanking those who were with him when he died. alexandra mackenzie reports. 82 seconds. that's all it took. in that time, khalid masood caused the deaths of three people on westminster bridge and injured many more. he crashed his car into the railings, ran through a gate at the houses of parliament and

stabbed pc keith palmer to death. last night, his family paid tribute to his selfless bravery, police believe that masood carried out the terror attack on his own, but are trying to establish if he was encouraged or directed by others. questions remain unanswered about his route to radicalisation. he was a violent criminal before converting to islam more than a decade ago. since wednesday, 11 people have been arrested. all have now been released except for a 58—year—old manfrom birmingham. detained under the terrorism act, he can be held without charge for 14 days. members of the public have come to the scene of wednesday's attack to pay their respects to the four people who lost their lives.

also to remember the many who were injured and those who remain in hospital. alexandra mackenzie, bbc news. the home secretary, amber rudd, says she'll meet representatives of social media companies this week, to discuss what further action they can take to address online extremism. writing in the sunday telegraph, ms rudd says such companies need to "take a more proactive and leading role in tackling the terrorist abuse of their platforms". the speed to correspondent, who is at westminster. mick, those remarks by the home secretary, she is looking to tackle a problem that has exited for a while. absolutely, or morning from westminster, where the tribute to pc palmer continued to grow. people have left flowers, messages, notes, a few members of the metropolitan

police quietly reading some of those messages. pc keith palmer's death and that of three people has prompted the home secretary to write this article this morning. her criticism of the social media companies is not new, but what we see today is she is broadening the net, singling out a few smaller companies who previously had not beenin companies who previously had not been in the home secretary's site, and her concern is twofold. on the one hand, you have got companies, as she would see it, raina platform for people to share poisonous ideology, a platform for hatred to be shared and spread. but also she is concerned about some platforms with the technology they use being encrypted, being a victim —— vehicle for terrorists to send messages often without the intelligence services being able to pick up on them. that is the criticism she is making today, she says it is not a case that they need to do more, they need to start helping the government

in the first place in some cases. and more details about the attack itself. extraordinarily, it was all overin itself. extraordinarily, it was all over in less than a minute and a half. absolutely. 82 seconds was all that it took. i think a few things emerge from that fact released by the metropolitan police, and also some other details they have been given. this was a busy place, clearly, at westminster. the carnage could have continued even longer had it not been for that officer who was able to shoot dead khalid masood. one other thing which struck me in the statement from that senior police officer was that he said we will never know, we may never know, why this man carried out this attack. if you think about it, but terminology, the language police often use, they say we keep an open mind, we're not ruling anything out, just four or five days after this deadly attack the police as saying it may be the case we will never get the answers we need. that is the sort of

statement you sometimes hear after an inquest or a protracted legal process. but we banged the police saying, in this day and age, someone may well have been radicalised in a way that is impossible to detect. and for the emergency and intelligence services, that is something of real concern for them. and even if they do not find out why this man carried out this attack, surely there will be lots of learning they can take from this to try and prevent another attack on future. and just bring us up—to—date with the police investigation, if you would. yesterday, when we were speaking, several people had been arrested. that is no longer the case, is it? that's right. the police made 11 arrests just in the allowance —— hours and days after the attack on wednesday. one man remains in custody, he is a 58—year—old man from birmingham. there is also a woman who has been released on

police bail. we saw the police acting quite fast, really. for them it was a difficult situation where the man who committed this attack, he was someone who has previously been investigated by mi5. we do not know exactly when. but he has been deemed to be a peripheralfigure, and he was not under surveillance when he carried out the attack, when he drove the car over westminster bridge and then stabbed to death pct palmer. the police tried to work out his associates, they talked to family members, leases he had been, at the reality is thatjust one man remains in custody, and as we heard a while ago the police in theory have 14 days to question him because under the terrorism legislation that exists, they have a fortnight to ask all the questions that they need. certainly the police investigation, we're not expecting to get any significant update today. but one man remains in custody. the police are still appealing for any sort of information, video, the boss from

the police which might help them piece together what are still quite fragmented and difficult picture. thanks nick. more than 30 people have been hurt — two of them seriously — after a suspected gas explosion in merseyside. a dance centre for children was destroyed and customers at a chinese restaurant were caught in the blast near birkenhead. andy gill sent this report. the scale of the devastation shows just how powerful the explosion was. one building housing three businesses totally destroyed. this is what it looked like before last night. the blast was heard up to six miles away. an almighty bang but as well as the bang there was pressure as well, i felt a lot of pressure, my window was shut, i thought initially it was in the house, i've ran around like a maniac for a minute looking round obviously to see if my house is still in tact and stuff like that. the sound of the building blowing up was captured

by a car's dashboard camera. what was that? two people were taken to a trauma unit in liverpool with serious injuries. 32 others were treated at hospitals in wirral and chester. there's a multitude of injuries that have happened but the two patients that have gone through to the major trauma unit at aintree have significant injuries. this has clearly been a huge explosion, powerful enough not only to bring down the main building and scatter debris for hundreds of yards, but also to punch huge holes in the walls of nearby buildings. the emergency services won't speculate on the cause of the blast but a number of local people said they smell gas yesterday and on friday. national grid engineers are on the scene. this incident is likely to be protracted, this is likely to last several days. very significant damage as you can tell. so it will be some time before

people will be allowed back into their homes. some people whose homes had to be evacuated spent the night in a local church. nearby roads are likely to be closed for some time. andy gill, bbc news, wirral. an investigation has been opened after the pentagon confirmed that american—led coalition fighter jets struck a location in the iraqi city of mosul where many civilians were killed. us central command says iraqi military requested the attack against islamic state militants. tim allman reports. day after day, the exodus from mosul continues. thousands of people have fled the violence as a battle rages for control of the city. plumes of smoke rise above the rooftops, s strikes and shelling taking a heavy

toll. now the us military has acknowledged coalition aircraft at a location in the west of mosul, and it may have been civilians who paid the price. both the iraqi military forces in the us coalition have acknowledged that there was an air strike and possibly hundreds of casualties will stop we are waiting to see what the results of the investigation are. we know that there have been many, many families that have been impacted by this tragedy, and that there are a large number of injured, a large number of deaths. ina number of deaths. in a statement, us central command said: those protected site as claimed include schools, hospitals, mosques.

sometimes people's homes. this is the neighbourhood where the s strikes happened. eyewitnesses say at least 50 bodies were pulled from the rubble days after the building collapsed. the dead included children, the elderly, pregnant women. thousands have left the city, but thousands more remain. how many more will lose their lives as the battle for mosul continues? hong kong's new chief executive has been chosen. carrie lam, seen in the middle here, is believed to be beijing's preferred candidate. she won in the first round of voting by a specially chosen committee. pro—democracy activists had denounced the poll as a sham, arguing that everyone should have a vote. in case you missed it, the clocks went forward this morning and some people working in the uk's tourism sector are calling for british summer time to stay.

the british association of leisure parks, piers and attractions says an extra 80,000 jobs will be created due to longer daylight hours. our business correspondent joe lynam has more. half of all tourist visits to britain take in a leisure or amusement park, such as alton towers, thorpe park and the london eye. now the group that represents these parks is calling for britain to be on the same time zone as france or italy. it says doing so would create a boost worth £2.5 billion—£15 billion to the economy. it says brighter evenings could cut co2 emissions by half 500 million tons a year and prevent a road deaths annually. balppa also says shipping time zones would encourage more outdoor activity and cut obesity levels, especially among children. but it has been tried before in the early 1970s when many scottish children had to go to school in the dark. it had, according to one snp politician, and absolutely devastating impact. joe lynam, bbc news.

let's ta ke let's take a look at the headlines on bbc news. scotland yard says the westminster attacker khalid masood acted alone, and his motive may never be known. detectives confirmed that the attack lasted just 82 seconds. more than 32 people have been injured, two seriously, after a suspected gas expulsion on merseyside. the pentagon admits that the us led coalition aircraft did strike an area of the iraqi city of mosul, where dozens of civilian work supposedly killed. voters in the german state of saarland go to the polls today, in a regional election that's widely seen as an indication of angela merkel‘s chances of staying on as chancellor. with six months to go before the german general election, her conservatives are polling neck and neck with the social democrats after the former european parliament president martin schulz announced he would stand against mrs merkel. jenny hill reports. not a vote cast yet, but already a

victory march. the social democrats think the saarland, and germany, is ready for change. translation: he is a breath of fresh air for the party, he has many new ideas, and i think he has many new ideas, and i think he can deliver them. she is talking about martin shilts, the man from brussels who has stirred up berlin. the book—seller turned politician famously beat alcohol addition. he has got angela merkel‘s conservatives on the back foot. in saarland they are fighting back, pretzels and politics at the factory gates. like angela merkel, the region's prime minister is established and well known here. at like angela merkel, she might well lose her seat. translation: it is a

challenge, yes, but that is the essence of democracy. from now until the national election it is about who has got a better plan for the country, and on this martin shilts has not delivered anything. we on the other hand, will offer a better plan and an excellent candidate. saarland maybe small, but what happens here matters. translation: it isa happens here matters. translation: it is a regional election which should deal with regional issues, but this time everything is different. the short effect is strong, and this is germany's first regional election this year. the vote will be heavily influenced by national politics. but the result will also affect the general election. expect some bruises. the right—wing are no longer in the game. this is angela merkel versus martin schulz. schulz translation: pits too much

emphasis on criticising the other parties. i like merkel better. he comes across as authentic, he says what he things, people like that. but i think you cannot implement many of the things he promises. this is what the schulz effect is all about. it can transform this tiny german state, and it might, just might, change the face of german politics. police in the belarusian capital, minsk, have arrested hundreds of people during the latest protests against a tax on the under—employed. thousands defied a government ban on demonstrations. the country's president insists the tax will not be scrapped. this report from greg dawson contains some violent scenes. the demonstrators cobb this freedom day. but there was little sign of

any freedom to protest when the riot police arrived. the government had banned this march, and those defying the orders were swiftly removed from the orders were swiftly removed from the streets. anyone resisting arrest was quickly beaten into submission. protesters young and old were dragged away. human rights groups say up to 400 were detained. this man directors anger at the country's presidents. he has been in power since 1994, and is described by some western officials as europe's last dictator. his $230 tax on people unemployed for six months, is at the centre of these protests. opponents say it punishes those struggling to find work. belarus has been in recession for the past two years,

suffering the knock—on effects of an economic downturn in russia. the president has suspended the tax for this year, but will not scrap it. he insists it instilled discipline in the work—shy. insists it instilled discipline in the work-shy. translation: i am not afraid. enough of fear. we have to come to the streets to show our discontent. we have freedom of speech in the country and we must speak. they are not giving us a chance to say a word. the president has recently spoken of a plot to overthrow him backed by foreign fighters. there have already been several weeks of protest in his country, saturday's crackdown was a clear message that further dissent will not be tolerated. fifa's former medical director has spoken out about the abuse of legal painkillers by elite footballers — something he says could have ‘life—threatening implications'. jiri dvorak, claims around half of players

involved in the past three world cups regularly took non—steroidal, anti—inflammatory drugs. he spoke to david ornstein as part of the bbc‘s state of sport week. it's known as the beautiful game but the pursuit of glory can be ugly. when injury occurs there is pressure to play through the pain and now a leading doctor says the use of legal medication is one of football's biggest problems. if you cover up symptoms over years or decades, this is general in medicine, if you have an underlying pathology and you constantly cover up with medication, the underlying pathology or disease is not cured. dr dvorak warned about this in 2012 when he found almost 40% of players at the 2010 world cup took painkillers before every game. football's governing body fifa say they are providing education

on the well—being of athletes, while the professional footballers' association insist it is not a major issue in the english game. but dr dvorak argues that lessons have not been learned. when i put on the weight on the scale the doping and the abuse of medication, the abuse of medication is much more alarming. wake up and be careful. it's not as harmless as you think, that you can take it like cookies. it has side—effects. well, this isn't about banned or hard to come by substances or supplements, it's about everyday over—the—counter anti—inflammatories like ibuprofen and the question is whether and to what extent these are being misused by footballers. it's widespread in football. always has been, always will be. as a player you first ask is it is legal? if it is, it's fine.

is it going to help you get through a game? yes. generally without too many questions, without too much concern, you'll take what you've been offered. the overuse of medication feeds into the wider topic of athlete welfare, an issue the government is taking seriously with a duty of care review due to be published shortly. david ornstein, bbc news. the first dinosaurs may have originated in the northern hemisphere— and could even have lived in the area that's now britain. it's just one of the findings in a new study published in thejournal nature, which suggests that theories about dinosaurs that have been around for over 100 years could actually be wrong. our science correspondent pallab ghosh has more. fossilised bones that capture a time that dinosaurs ruled the earth, more than 65 million years ago. by measuring how they changed over the years, researchers worked out how they are related, and how they evolved. but a new assessment published

in thejournal nature, which suggests that that theory which has lasted 130 years, maybe wrong. the current theory is that there are two main groups of dinosaurs. one, including the stegosaurus, and another which has two branches. the vegetarians such as the brontosaurus, and the meat eaters such as the savage tyrannosaurus rex. it turns out that the meat eaters are in the wrong group and should be with the stegosaurus. it also shows that the very first dinosaurs did not originate in east africa, but much further north, possibly in an area which is now britain. we have taken dinosaur origins, which originally were thought to be southern hemisphere and brought them into the northern hemisphere, and it could well be that dinosaurs originated even within britain itself. what we have here is a key specimen in this analysis. and here is the fossil that led

to this shock finding, a primitive dinosaur the size of a cat was found in lossiemouth in scotland. it was an animal like this that led to the creatures that dominated this planet for 165 million years. the new family tree will mean that we will have to rethink our ideas of how they evolved and spread across the globe. this is a fairly major change to our knowledge of dinosaurs. we have had a system in place for 130 years, we thought we understood the relationships of these big groups of animals, but it may be that we have a major rearrangement of the dinosaur tree. this re—evaluation of fossils challenges a theory that has been accepted since the victorian era, and so will be controversial. but if it is proved to be correct, textbooks on the subject will have to be rewritten. a rare historic latin mass is being

recreated attitude at chapel using state—of—the—art sound recording. it will bring to life a service attended by henry viii after he severed ties with the catholic church. it was a pivotal moment in the reformation and in british history. the last time this catholic mass resonated around these walls was nearly 500 years ago. and in the congregation was king henry viii. the chapel as it would have been experienced here is not what you think about as a parish church. you would not have sat down and listen toa would not have sat down and listen to a service, in fact, the lord of the house would have sat above you and looked and its period is going on before him. the choir was singing the mass, the priest at the altar, it would have been a completely different experience to what we have

today. lady mass has been recreated in immersive sound, which means you can hear different parts of it as you move through the chapel. what you are trying to do is create an audio illusion, so that if you we re an audio illusion, so that if you were to walk into the chapel, close your eyes, you would hopefully get the impression there was a service, a mass going on. obviously if you open your eyes there is no one there. the sounds accompanied a pivotal moment in our history. henry was here trying to stifle a rebellion after his break with rome. this is the very place that on october 17 1535 henry would have been to listen to the mass. but it was notjust about religious worship, his courtiers said it was the only time they could guarantee the king was sitting still long enough to deal with matters of state. which

included securing the valuable loyalty of william, lord sans, a devout catholic. the other people who were rumoured to be involved in the rebellion do indeed ravel, but lord sans doesn't. so this kept people like him onside, helped cement the reformation, so it is really crucial and a pivotal moment in british history. and with those political undertones long gone, the past can meet the present in perfect harmony. the former x factorjudge cheryl has announced that she has given birth to her first announced that she has given birth to herfirst child, a baby boy. the singapore stood a photo of her pop star partner liam payne cradling the new born on social media is racked —— the singer. they have yet to decide on a name for their son. let's ta ke decide on a name for their son. let's take a look at the weather forecast.

it has been a glorious start day, sunshine across—the—boa rd for it has been a glorious start day, sunshine across—the—board for most of us. a fantastic sunrise across the east coast of england, the warning red sky in the morning shepherd's warning, the shepherds do not have to worry, cos today is going to be a fantastic day. sunshine across—the—boa rd, early—morning mist clearing away from the western isles. across shetland it will be quite cloudy through the day, another warm day, temperatures could hit 19 degrees across sheltered parts of northern scotland. it could yet be the warmest day of the year so far. overnight we will keep those clear skies. chilly to northern ireland and scotland, orchids of rural frost. monday, more of the same, might bea frost. monday, more of the same, might be a little bit of low cloud to start the day across eastern parts of indolent. sunshine coming out across—the—board. parts of indolent. sunshine coming out across—the—boa rd. lighter winds across south—east england, it should be warmer, temperatures 17—18. otherwise the highest temperatures

generally in the west. hello, this is bbc news. the headlines: scotla nd scotland yard has confirmed that the attack in westminster to just 82 seconds. his motive may never be known. the family of the police officer keith palmer who was killed have paid tribute to his selfless bravery and loving nature. in a statement they expressed their gratitude to the people who helped him after the attack saying "there was nothing more you could have done." more than 30 people have been hurt, two of them seriously, after a suspected gas explosion in merseyside. a dance centre for children was destroyed and customers at a chinese restaurant were caught in the blast in bebington, in wirral. several homes were also evacuated.