This luxury yacht is the definition of 'mega.' Built for Russian billionaire Andrey Igorevich Melnichenko, superyacht 'A,' the 'White Pearl' is making its test voyage in Kiel, northern Germany. The ship is believed to have cost almost £260million and will be the world's largest sailing yacht. At 468ft in length, with ship masts nearing 300ft high, the 'mega-yacht,' has eight floors and will include an underwater observation room.

New claims about the Prime Minister and his days at Oxford have emerged in a new book, Call Me Dave: The Unauthorised Biography of David Cameron by Lord Michael Ashcroft. The book details how the PM, pictured (left) with another student at Brasenose College, Oxford, once enjoyed smoking joints with friends James Fergusson - now a distinguished writer - and James Delingpole, a high-profile Right-wing journalist, in the latter's room at Peckwater Quad, one of the finest quadrangles in Oxford's Christ Church college. Often, the trio would be listening to the Seventies rock band Supertramp, and bantering inconsequentially about their love lives while getting stoned. There's no suggestion Cameron, pictured (right) with the Bullingdon Club at Oxford in 1988, ever had anything more than the occasional joint while at Oxford, but whether he dabbled in hard drugs in his 20s and early 30s is a question that has been hotly debated in Westminster circles.

David Cameron was the source of widespread internet mockery this morning over the bizarre allegation that he once 'put a private part of his anatomy' into a dead pig's mouth. According to a bombshell new biography of the Prime Minister, Mr Cameron performed the stunt at an initiation ceremony for a debauched Oxford dining club. The claim sparked hilarity online, with thousands of messages posted on Twitter mocking the Tory leader as 'David Hameron' and romantically linking him to 'Miss Piggy'.

A 42-year-old woman arrived at Saint Francis Hospital in Rotterdam with leg sores (pictured bottom left) due to cocaine being cut with Levamisole, known to rot human flesh. Levamisole is normally used as by vets as a livestock de-wormer. Its use in humans was discontinued after its skin rotting effects were discovered (pictured top left and right). It was also found to lower people's white blood count, meaning they catch more infections. Around 80 per cent of cocaine shipped into the US and UK is now cut with Levamisole.

There were ill-fitting gowns and eyesores galore on the 2105 Emmy Awards red carpet this year and the likes of (L-R) Amy Schumer, Heidi Klum, Elisabeth Moss, Sophie Turner and January Jones all missed the mark when it came to red carpet dressing.

Shane Goldsmith (left) allegedly went to a One Show recording and expressed his love for the Welsh TV star (right) by shouting at her from the audience. He also allegedly bombarded Miss Jones with Twitter messages declaring his love and asking the 38-year-old host to meet him. Goldsmith, who represented himself at Westminster Magistrates' Court today, pleaded not guilty to one charge of stalking Miss Jones without violence between April 1 last year and September 2 this year. Senior District Judge Howard Riddle said it would be sensible for Miss Jones to appear as a witness and provisions may be made so she can give evidence from behind a curtain.

The club invited Zaid Abdel-Muhsen Alghadab (left), his father Osama (right) and brother Mohammad to the Spanish capital on Saturday night as part of their campaign to support refugees arriving in Europe. There was global outrage earlier this month after shocking footage emerged showing Hungarian camerawoman Petra Laszlo kicking children and tripping Osama up as he carried a terrified Zaid across a field on the Hungarian-Serbian border (inset).

In a full-page advertisement in several newspapers, including Lebanon's leading An-Nahar and Jordan's Al-Rai, the government said 'the strongest possible action is taken' against people who attempt to enter Hungary illegally (pictured bottom left). The news comes as Austrian police revealed that nearly 24,000 refugees crossed over border from Hungary over the weekend, with a further 3,200 arriving this morning alone. Meanwhile Croatia have set up a migrant reception centre in the eastern village of Opatovac (bottom right).

Rachel Stevens is believed to have left her two daughters - aged four and 18 months - unattended in her car while she ran errands last week. The S Club 7 singer was pictured in north London having driven up to a parking space in her black car, with her little girls in tow.

WARNING: GRAPHIC CONTENT Female mayor Maria Santos Gorrostieta (top right), aspiring actress Carmen Esparza (top left) and politician's daughter Isarve Cano Vargas (bottom right) are among the thousands of women (inset) murdered in Mexico every year. MailOnline visited the country's most deadly state, Guerrero, considered the most dangerous place for women in North America. Just one of the locals who have had their lives ripped apart there is Ahilin Quiñones, 19, whose mother Aide Nava (together at Ahilin's wedding day, bottom right), father and brother have all been murdered by cartel members in her home town of Iguala. After vowing to rid the town of its opium-cultivating gangsters, Aide Nava was kidnapped by cartel members who tortured, raped and decapitated her. They left her body in the open, covered in a spray painted white sheet which read: covered it in a spray-painted sheet which read: 'This will happen to anyone who doesn't get in line.'

It seems air passengers still haven't quite got the hang of travelling in style. Disgruntled flyers and flight attendants from around the globe, have taken their frustration to social media to shame feral passengers with annoying habits, shared on Instagram, under the hashtag #passengershaming.

Jodi Cahill (main) found out she and her mother shared the same father after a horrific family secret was revealed in a two-page letter (bottom inset). For years, the Melbourne public relations executive did not understand why she had such a troubled relationship with her parent until she was told she was conceived after her grandfather (left with a younger Ms Cahill) raped her mother at gunpoint. Instead of dealing with the trauma, Ms Cahill developed anorexia (right inset) and soon she dropped to a dangerous 34kg. Now the 38-year-old has spoken out about her experience in the hope it will help someone else.

Without a doubt they are one of the most famous couples in the world. So it came as quite a surprise to locals in Nailsworth, Gloucestershire when Victoria Beckham made a quick stop at a corner shop in the town as her husband David waited outside for her in his car. Spotting the superstars, three young fans were quick to capture the random occurrence on Saturday and posed for pictures with the fashion designer, 41, and ex football player, 40.

YouTube actor Coby Persin posed as 15-year-old Amanda Green and used the internet to lure three teenage boys in the New York area to potential danger in just 24 hours. In the clip one boy aged 12 lets himself into a stranger's house (left) before being confronted by two men and his furious mother, who was in on the experiment (bottom right). Meanwhile another boy, 14, is bundled into the back of a transit van after willingly attempting to climb inside (top right).

Zoe Chambers, 28, and Charlie Loughlin (left), 27, from Haslingfield, Cambridge, hired charity Food Cycle to cater their big day. 150 guests (top right) were treated to two mouth-watering dishes of Panzaella salad and a Moroccan-style tagine (bottom right). The meals were prepared by charity Food Cycle which usually creates meals for people at risk of food poverty and isolation by using food discarded by shops. The couple, who made a cash donation to the charity, said their 150-strong party 'loved' the food.

Jackie Collins, who died this weekend aged 77, had a wild, tumultuous life among some of Hollywood's biggest names. She used these relationships to inspire her well-loved books. Brando, as we shall see, wasn't the only star who chased her when she was just 15, and there was even a blind date she had enjoyed while still a teenager in London with an unnamed 'prince' who turned up to pick her up in a gull-wing Mercedes. Her undeniably wild youth notwithstanding, Collins always insisted she was really quite moralistic and that her amoral fictional characters always got their come-uppance in the end.

Scarlett Leithold, 18, is taking the retail industry by storm after being scouted at the age of just 14 at an airport. The teenager signed with Wilhemina Models at 15, but has now moved on to Next Models. Her profile has risen significantly since she began modelling for Brandy Melville, an Italian brand that has developed a cult following in the United States. She also garned a lot of attention on social media earlier this year when Justin Bieber posted a picture of her on his Instagram account - which attracted more than a million likes.

CCTV footage captured the man walking along a busy street in an unnamed Saudi city when he stopped momentarily to check if he had something stuck to the bottom of his shoe. Although he didn't know it at the time, the momentary pause actually saved him from being crushed to death, as just seconds later a huge pane of glass plummeted to earth, smashing at his feet.

The remains of the settlement (pictured top right), which is thought to have collapsed due to an earthquake, were uncovered on the 'big island' of Durankulak Lake in the North East of Bulgaria. Excavations at the site, known as 'Dobrudzha Troy' started in the 1970s when artefacts dating back to around 10,000 BC were discovered, along with evidence of the Neolithic settlement. Researchers have described the Palaeolithic settlement as 'possibly Prehistoric Europe's largest stone building'.

A Surrey-based charity which works with transgender children say the number of youngsters wanting to change gender is 'increasingly rapidly'. The organisation wants nursery and infant school children to be given Penguin Land stories, which introduce young children to gender identity issues. The stories feature the birds saying things such as: 'We can't always tell if you're a boy or you're a girl.' MP Maria Miller (inset) is chairing an inquiry in prejudice against transsexual or transgender people.

Kirone McCaffrey, 25, from Dagenham, Essex, had known he was transgender since the age of four (he is pictured, left, as a young girl). In 2009, at the age of 19, he legally changed his name from Kiri to Kirone and began the sex change process. This involved testosterone injections which caused his voice to crack and lower - and triggered the appearance of body hair. For his 23rd birthday, he had breast removal surgery which cost £4,000 (he is pictured after the surgery, right and inset). In 2013, he had the first of three phalloplasty operations, in which a penis was constructed from the skin of his arm. Though it has been a 'long, drawn-out process', he is finally happy with who he is. He said: 'Everything from the body hair to the bulked up body to the surgeries have made me feel like I am finally who I am supposed to be. It was horrifically painful and I needed 11 weeks off work - but the moment I was able to pee standing up, I felt truly masculine.'

A group of Nile crocodiles have been photographed attacking a migrating zebra then eating it alive while it desperately attempts to cross a river to safety. Taken by wildlife photographer Paolo Torchio, 54, the pictures show the crocodiles swarming around the zebra after it was first attacked, then ripping it to pieces in the water. The dramatic scenes unfolded on the Mara River, in Kenya's Maasai Mara National Reserve, which is regularly crossed by migrating zebra and wildebeest - but also home to hundreds of crocodiles.

The clip shows Bridget McDonald, who suffers from Korsakoff's syndrome, being labelled a 'tramp', 'hopeless' and 'such a baby' by one carer at The Ridings home (bottom right) in Birmingham. Another carer can be heard threatening the 68-year-old, telling her: 'Next time I call you, don't f****** ignore me' before ripping the duvet from the bed (left; top right). The camera was hidden in a bedside clock by Bridget's daughter Rachael, 37, after she became concerned her mother's behaviour was changing at the end of last year. The two carers caught in the footage - Adam Hunt and Rachel Pritchard - have since been dismissed from their position as care workers, with Mr Hunt also receiving a caution from West Midlands Police for common assault.

Photographs recently emerged of a doctor calming a girl on Chinese social media became wildly popular. The girl was about to have heart surgery in Zhejiang, China, on September 18. She started crying when the doctor brought out his phone so she could watch cartoons (pictured). She calmed down as a result so doctors could administer anaesthesia and continue the surgery. The girl is said to be recovering well.

Cathy Davies, 52, from Widnes, Cheshire, used meal replacement milkshakes to lose five stone because she didn't want to be fat at 50. Cathy, a development manager for Tesco, survived on service station meal deals before her transformation. Now friends say she looks 10 years younger. The 52 year-old has a new lease of life and is looking forward to being fit enough to play with her first granddaughter.

The public are being urged to vote for their favourite tree in England, Wales, Scotland and Northern Ireland for the Woodland Trust's Tree of the Year contest. Among those shortlisted are the bibby tree, the historic centrepiece of the Tropical Palm House at the Royal Botanic Garden Edinburgh (top left), an 800-year-old yew in St Martin's Church in Cumbria (top right) and Boscobel Oak at Boscobel House in Shropshire (bottom left), which is a descendant of the Royal Oak, the hiding place of the future Charles II after he failed to regain the throne following his father Charles I's execution in 1649. Others nominated were the Dark Hedges in Stranocum, Northern Ireland, an avenue of beech trees which featured in Game Of Thrones (bottom right), and The Birnam Oak (centre) on the outskirts of the Perthshire village in Scotland. Voting closes on October 12.

The winners of the fourth annual Zoological Society of London (ZSL)'s wildlife photography competition have been announced...and they are spectacular. Over 450 submissions were entered, with a panel of judges including Kate Humble and Bill Oddie awarding prizes to pictures including nuzzling lions (left), an inquisitive tree frog (top right) and a swimming turtle (bottom right).