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 tried to go straight and trained as a carpenter. In February 1960, he married 21-year-old Charmian (Brent) Powell in Swanage, the daughter of a primary school headmaster. They had three sons together. Biggs, who needed money to fund a deposit on the purchase of a house for his family, happened to be working on the house of a train driver who was about to retire. The driver has been variously identified as "Stan Agate", or because of his age, "Old Pete" or "Pop". His real name is unknown, since he was never caught. He was the one who introduced Biggs