PRINCE Harry has split from his girlfriend Chelsy Davy, after she decided that she could no longer cope with the pressures of his military career. Chelsy, 23, who has just returned from a holiday in South Africa and Mozambique, has told friends their five-year relationship is over. The news leaked out after she altered her profile on the social networking website Facebook to read: 'Relationship: Not in one'. Last night a senior Royal source confirmed the couple had separated, just three weeks after they returned from a romantic break in Mauritius. The Prince, promoted to lieutenant last April after a ten-week tour of Afghanistan, was also said to be worried about the strains on the relationship after recently starting an arduous 18-month training course with the Army Air Corps. A military source told The Mail on Sunday: 'Harry's training is going to be seriously demanding and he has been told there will be little time for girlfriends and socialising. 'He is living in a modest room with a single bed and won't be allowed to drink from Monday to Friday, and he will need to knuckle down.' However, the split will be a blow for the 24-year-old Prince, coming so soon after the race row that followed the release of a home-made video in which Harry was heard to refer to a fellow cadet at Sandhurst as a 'little Paki'. Zimbabwean Chelsy, who is studying a postgraduate law course at Leeds University, had recently spoken of plans to relocate to the UK and make London her full-time home in order to be closer to her boyfriend. They discussed the idea during their New Year holiday to Mauritius, but Chelsy called off their relationship last week after reconsidering her future. Sources in Royal circles believe that the move is a permanent one. A senior aide said: 'Harry has said it's all over with Chelsy, but he has insisted it is amicable. - Daily Mail 'It's all very recent and has come as something of a shock. They are a couple who were very much in love, it just seems to be the case that it was the right person for Harry but the wrong time. They are still very young, so who knows what will happen.' Chelsy has told friends she is now reassessing her future. She had planned to join City law firm Allen & Overy after her graduation later this year. The company confirmed: 'We did offer her a place and she has accepted.' But last night friends said Chelsy would probably move back to South Africa now the relationship is over. 'Chelsy has told us it's over and it looks to be permanent because the last time they split, Chelsy never changed her Facebook status,' a source said last night. 'This time she has made a point of doing so. 'She said the reason they split is because they just don't get enough time together and Harry's Army course has put a lot of pressure on them. 'He's told her it has to come before anything, and she's a bit fed up of always coming second. 'She was prepared to make a big sacrifice by moving to the UK. She had her job lined up and a place to live in London. She's a very bright girl who wants to be a successful lawyer, but that's all up in the air now. 'She misses South Africa so much that I imagine she will move back if things are over with Harry for good. She finds the weather here really depressing and she suffers terribly from homesickness. 'She has just returned from a beach holiday with friends. That's when she decided to call the relationship off.