My Dad worked at a prison with worst break-out record in England. His often missed inmates would have been very impressed with the innovation set out in this story. It tells:

Prison staff foiled an apparent attempted breakout in which inmates allegedly hacked through a wall and disguised the hole they had left with fake bricks made out of papier-mache.

Two inmates are said to have dug through the thick wall of a cell at Exeter prison and jammed the false, painted bricks into the gap to hide what they were doing.

Unfortunately for them, a guard spotted masonry dust on the ground, while another staff member saw that the brickwork on the exterior wall of the second floor did not look quite right – and the plot was rumbled.