A Dartmoor prison lifer dressed in a paper Origami costume in his cell rehearsing for an opera sponsored by Glyndebourne . Dartmoor Prison inmates and staff were coached by Glyndebourne Opera Company for their own production of 'The Transformation' to be staged in the prison. Darren Colling, a prisoner, was rehearsing his role as a robot, watched by Prison Warder Colin Anderson who also had a singing role. 1990s.