Reginald was born in Widford, Hertfordshire on 21 August 1889, the 2nd son of James and Elizabeth (nee Haggar) Clark at Widford, Hertfordshire. By 1901 they were living in Ashwell, Hertfordshire where Reginald was a pupil at the Merchant Taylors School.
Albert was born at Ashwell, Hertfordshire on 3 December 1889, the 2nd son of George Goodchild Covington and Emily (nee Waldock) Covington. He was a pupil at the Merchant Taylors School in Ashwell.
Harry was the second son of Arthur and Eva Eliza Ann (nee Smith) Covington born in January 1890 at Ashwell, Hertfordshire. He was a pupil of the Merchant Taylors School in Ashwell.