Architect. Born Bolton. c.1897 he moved to London and worked briefly for C. R. Ashbee. 1899 he moved to H. Percy Adams' practice where he stayed for the rest of his career. c.1906 moved to Harmer Green, near Welwyn, where he designed a home for himself and his wife. He lived and died in this house.
1923, through Frank Pick, Holden began working for London Underground and this led to him designing many tube stations - the Wikipedia list includes 49.
Wikipedia has a list of Holden's buildings. The important, non-station, London buildings include: Zimbabwe House; Senate House; 55 Broadway; Belgrave Hospital for Children in Kennington; 54-62 Oxford Street (corner Rathbone Place).