317343 leads the 07:22 Peterborough to Kings Cross service past Abbots Ripton on 16 August 1988. The Class 317s were the first class of 25kV units built using the Mk3 bodyshell, and were originally introduced onto the St Pancras to Bedford route, displacing the Class 127 diesel hydraulic units. However, the 317s didn't stay there long, and soon took up duties on the ECML.