Larry Marley to come to fruition, he joined the blanket protest in the Maze's H-Blocks for four years. In September 1983, he helped Brendan McFarlane, Bobby Storey and Gerry Kelly to orchestrate the successful mass escape of 38 republican prisoners from the Maze. It was the largest prison escape in British penal history. According to a BBC documentary about the escape, Marley was the mastermind, having come up with the idea with the aim of embarrassing British Prime Minister Margaret Thatcher, as the Maze was considered to be one of the world's most secure prisons. Marley, unlike his three co-conspirators, did not
Mountjoy Prison helicopter escape and sentenced to a further two years imprisonment for escaping. Twomey evaded recapture until 2 December 1977, when he was spotted sitting in a car in Sandycove by members of the Garda's Special Branch who were investigating an arms shipment after a tip-off from police in Belgium. Twomey drove away after spotting the officers, before being recaptured in the centre of Dublin after a high-speed car chase. He was also imprisoned in Portlaoise Prison until his release in 1982. Mountjoy Prison helicopter escape The Mountjoy Prison helicopter escape occurred on 31 October 1973 when three Provisional Irish Republican Army (IRA)