Sidney's birth was registered in the Hackney district of London in the 2nd quarter of 1907.
The 1911 census shows him, age 3, in Hackney, London, birthplace Homerton, London. Parents Frederick John Yates, 40, carman (brick cart), born Poplar, London and Clara Amata Yates, 36, born Hackney.
Sidney worked as a cabinet-maker. The 1939 UK Register records him at Mitcham, Surrey, birth date 5 April 1907.
In 1941 he married Frances Cayley. The marriage was registered in the 3rd quarter of 1941 in the Brentford district of Middlesex. They lived at Ealing, London.
His death was registered in the Hammersmith district of London in the 2nd quarter of 1977, with his birth date given as 5 April 1907.