Dl is Strangeways' punishment landing, known as the Block. It is a place where men are sent to be punished for breaking prison rules. There is also a segregation unit where prisoners regarded as too subversive to live in the main prison are placed by the Governor for ' good order and discipline '. The officers who work here must be constantly on their guard, for it is a place of tension, where the 'smash up' is almost commonplace.