Jack Slipper Jack Slipper Jack Kenneth Slipper (20 April 1924 in London – 24 August 2005 in Pershore) was a Detective Chief Superintendent in the Metropolitan Police in London. He was known as "Slipper of the Yard" (referring to Scotland Yard). He was mainly known for his role in investigating the Great Train Robbery of 1963, and in tracking down Ronnie Biggs after he escaped from prison in 1965, although he had to leave Brazil without Biggs. Slipper was born in Ealing, west London, and educated at Little Ealing School. He left school aged 14 and worked as an electrician's apprentice until
Ronnie Biggs to the train robbery plot. Reynolds gave Biggs the job of arranging for Agate to move the train after it had been waylaid. On the night of the hold up, Biggs told his wife he was off logging with Reynolds in Wiltshire. The gang then stopped the mail train from Glasgow to London in the early hours of 8 August 1963, which was Biggs's 34th birthday. Stan Agate was unable to operate the main line diesel-electric locomotive because he had only driven shunting locomotives on the Southern Region. Therefore, driver of the intercepted train, Jack Mills, was coshed with an