The UK’s longest-serving prisoner, dubbed Hannibal the Cannibal, is to spend his 51st Christmas behind bars . Quadruple killer Robert Maudsley, 71, is feared so dangerous he has been given his own special cell and kept apart from other inmates for almost 17,000 days, or 46 years. Maudsley, born Robert Mawdsley on Merseyside in 1953, was first sent to Broadmoor secure hospital in 1974 after garrotting John Farrell, who had picked him up for sex. He earned his frightening nickname after killing