Steam train services serving Barkingside were suspended on 29 November 1947 .
Electrified Central line passenger services , to Central London via Gants Hill , finally commenced on 31 May 1948 .
Steam train services serving Barkingside were suspended on 29 November 1947 and electrified Central line passenger services , to Central London via Gants Hill , finally commenced on 31 May 1948 .