Causes: It is caused by yeast called Malassezia, which normally exist in small numbers on the skin. Certain conditions however, can cause the overgrowth of the yeast, causing the development of white and reddish-brown spots on skin.
The 3 men all escaped and made it back to the Britain.   The Great Escape shown in the film happened in March 1944 having been planned first in January 1943. It consisted as per the film of 3 tunnels Tom Dick and Harry, Tom being discovered by the Gestapo.
Tunnel Creation. A prisoner dummy. Prisoners can start digging a tunnel out of their Cell or Dormitory (not Holding Cells), using the fastest route to the outer-most wall beyond the prison area. A tool, such as a spoon, is required to dig. Many weapons (e.g. knives, forks) can also be used as a tool to dig tunnels.