A 14-year-old boy who has been missing for three days may be using a different name.
Steven Tiffin, from Buckingham, was last seen in Century Avenue, Oldbrook, Milton Keynes, at 12.30am on Sunday from where he is believed to have caught a train to London Euston.
He may be using the name Steven Nash and may have returned to Milton Keynes since.
Steven is white, 5ft 10ins, of slim build with short mousey brown hair and was last seen by a relative wearing jeans and a grey hooded top.
He is thought to be carrying an army style backpack.
Steven has links to Aylesbury, Milton Keynes, Oxford and Northants and is missing for the third time in a month.
He first went missing on May 19 but was found safe and well on the same day. Steven then disappeared for a second time on June 4 before being found the next day.
Detective chief inspector Richard North said: “We are growing increasingly concerned about Steven’s whereabouts and believe he may have travelled out of the area to London. However he may well have returned to Milton Keynes later that day.
“Steven is a 14-year-old boy who has been missing for three days now and it is vital that anyone with information about his whereabouts gets in touch with us so we can establish that he is safe.
“If you see this appeal Steven please call 101 and let us know you are safe.”
Anyone with information about Steven’s whereabouts is urged to call 101, quoting occurrence number 43140092907.