Biggs was sent to Wandsworth Prison, a maxmum security prison. lt had one very high wall to keep the prisoners in, and some guards to watch them. One afternoon in July 1965, Biggs was in the prison yard. He had been in prison for just fifteen months. A tall van stopped outside the prison, and a ladder was placed against the wall. Then a rope ladder was thrown over the wall into the prison yard. Biggs climbed up the rope ladder jumped down into the van and escaped!