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a bbc investigation has found that youtube stars are being paid to promote an essay writing service, effectively encouraging students to cheat on coursework. youtube says it's now taken some of the videos down. the cases of more than 2,500 people being treated for neurological conditions in northern ireland are being reviewed. it's because of concerns over the work of a consultant. a jury's heard how four children from greater manchester died, when their house was fire bombed last december. it's claimed the family was targeted as part of a feud. the tv chefs, jamie oliver and hugh fearnley—whittingstall, have told a group of mps that childhood obesity is now a "catastrophe" and an "emergency". they've been giving evidence

to the commons health committee. the celebrity cooks are urging the government to introduce a range of measures, including restrictions on junk food adverts. we're in an arms race between the big food brands competing with each other again they're extremely good at. and they are racing for our appetites and we are ultimately the losers. we have a big problem now. i have seen that there are a lot of areas that can be taken for the better. i'm right with jamie. we need to see all of these leftist beanpole. chapter two should not be equated to chapter three, four, five. chapter two should be the neck —— let's fix that now chapter. today's the first of many. this is mayday for the obesity crisis. jamie oliver had pushed for the then prime minister david cameron to introduce reforms to tackle childhood obesity and spoke of the lack of action in that government's strategy. when i look over the last child

obesity strategy that was published, when i go through the basics of doing words with my seven—year—old son, there wasn't many doing words in that plan. it was a lot of suggestion, a lot of i would like and a lot of the old rhetoric around personal responsibility and people that should do things. and i think the world has changed since then. for nearly 100 years cambridge university's library tower has been closed to the public and shrouded in mystery, sparking rumours and tall tales among students about what treasures may be housed within it. but now the tower‘s secrets are to be revealed to the public for the first time. tim muffett reports from cambridge. this is an uplifting story. it's about a building that dominates the cambridge skyline and which contains one of the world's most remarkable

collection of books. hello, mark. hello, tim. welcome to the tower. 140 feet above cambridge city centre. the tower contains close to a million books. since 1710, cambridge university library has by law received a copy of every book published in the uk, but many were not deemed to be of academic interest, so a tower was built to house them where they could be stored and largely ignored. the tower was built in 193a, designed by giles gilbert scott, who is better known, i think, for the red telephone box. the whole point about a library like this is we're not making judgments about whether things are significant or interesting. the stuff was published, we acquired it. and there's just this mad diversity of stuff. there's school textbooks about trigonometry, there are storybooks, there's stuff about naval battles. there's a book from 1914 about life insurance, something about field sanitation, there's a pamphlet here arguing about whether we should have the channel tunnel in 1914. a new exhibition allows rare access to visitors to the tower to see some of the collection close—up. this is a first edition of tolkien‘s

the hobbit published in 1937. initially this was considered not that important, let's shove it in the tower. exactly, just one of the many thousands of books that came to the library that year. so this is a first edition of ian fleming's casino royale, the firstjames bond book. we had to make the most of the academic material, the histories, the literature. but the popular books were not considered that important, and so they were put up in the tower. it is hoped the exhibition will finally be dispelling one long—standing rumour. the most famous myth is that the tower is stuffed to the roof with victorian pornography. this is actually not true. but we are a legal deposit or "copyright library." so, by law we have received a copy of every book published for over 300 years, so whether that is knitting, a magazine about train—spotting, or an academic textbook, or an article by stephen hawking, we will acquire it and we will hold it for the long—term. the latest chapter for a remarkable building. tim muffett, bbc news.

time for a look at the weather with tomasz. beautiful weather across the country. going downhill out west. tomorrow, there is rain on the way but only for a time. this is the weather am currently moving across the uk. eastern areas still in the clear. but the clouds are rolling out of west. rain is expected across many western parts of the uk through the course of this evening. it will reach cardiff, plymouth. looks the extreme east are just about lincolnshire on the east of lincolnshire, east anglia, perhaps the east southeast. then that ran arise first thing in the morning on wednesday in london. the weather front will keep crossing the country asa front will keep crossing the country as a good through the course of the morning. quite heavy for a time at

least in the midlands and parts of northern england. later on wednesday morning and then it made afternoon just exiting norfolk and suffolk. we have a mixture of sunshine and showers. eight fresh day, temperatures around only ten to 13 degrees. should track tomorrow and bea degrees. should track tomorrow and be a fine end of the day for most of us on be a fine end of the day for most of us on wednesday. that's the middle pa rt us on wednesday. that's the middle part of the week. how about the second half of the week, things are on the up. things are changing. gestures to the north of us with more merits of the south and it looks as though this plume of former air is heading our way. that bodes very well. for the bank holiday weekend. a run—up to the bank holiday weekend, the weather will start to warm up. there will be a fair bit of clout around on thursday. drizzle in the northwest. you can see temperatures are strained to look up now. that was thursday, this is friday. maybe some spots of drizzle here and there.

client will be breaking up. —— cloud will be breaking up. those temperatures will be rising in london. we might make around 19 or 20 degrees and not far off of that across eastern parts of scotland. through the bank holiday weekend, the jet streams way to the north of us the jet streams way to the north of us and pushing in that warmer air out of the southern climes. to summarise all of that because it is looking fine. warming up this bank holiday weekend and looking mostly dry. bye—bye. you're watching beyond 100 days. the battle lines are drawn on the future of the iranian nuclear deal. now we wait donald trump's verdict. the israeli prime minister says tehran has lied "big time" — the british foreign secretary says that's exactly why we need the accord. mr neta nyahu's case was big on dramatics — less big on new information. he didn't show evidence that iran has lied since signing the accord. what questions would you like to ask donald trump

about his ties with russia — would they be the same as those on robert mueller‘s list? we'll show you what the special prosecutor is looking at. also on the programme. are the lords the guardians of parliamentary sovereignty — or a house of unelected wreckers? right now, the peers stand in the way of the government plans for brexit. the white house chief of staffjohn kelly is forced to deny he called mr trump an idiot.