Percy was born in the 1st week of December 1899 at Finsbury Park, Islington, Middlesex, the elder son of Mark William and Ruth (nee Brown) Bullimore. He was a pupil at the Merchant Taylors School in Ashwell.
Ralph was the second son of Amos Covington and Elizabeth (nee Waldock) Covington, born at Islington, London in the 1st quarter 1898.
Harry was the eldest son of Julius James Eversden and Emma (nee Harradine) Eversden, born at Islington, Middlesex on 7 November 1879. He was christened in Ashwell and he was a pupil at the Merchant Taylors School in Ashwell.
Joseph was born at Islington, London in the 1st quarter 1901, the elder son of Joseph and Annie (nee Harradine) Waldock. He was a pupil at the Merchant Taylors School in Ashwell.