Jail break plan turns sour

A cunning plan to spring a killer from a jail on England's Isle of Wight by helicopter was foiled by prison guards and police when prison staff spotted the bizarre phrase "more heat, less light" in a document.

Source:
http://www.dailytelegraph.com.au/news/breaking-news/muderer-planned-escape-with-chopper-invisible-ink-and-sudokus/story-e6freuyi-1225881544498