Metropolitan Railway Bo-Bo No.12 Sarah Siddons arrives at Amersham with the 14:28 special service from Watford on 14 September 2008. This was part of the London Transport Museum's Heritage Day, which also saw the use of classic London buses from Amersham station, including the iconic Routemasters. Obviously there are more relaxed rules with regard to cab rides on the underground network, as both of Sarah Siddons cabs are occupied by children enjoying a day out on the rails.