GB Railfreight 20s were out on Network Rail’s autumnal rail head treatment trains in their battle the keep lines clear of wet leaves, theses train frequently take locomotives to routes and branches that are normally ‘unit only'. Here 20905 and 20901 top 'n' tail the 3W91 Tonbridge West Yard to Tonbridge West Yard via New Cross Gate, Sutton and Epsom Downs at Wallington after returning from Epsom Downs and returning home. This working is one of the Sussex standby turns and runs in response to driver's reports on poor rail adhesion to Network Rail route control.