The 6Z20 07:06 Derby to West Ruislip barrier wagons ambles down the Chiltern Line at Ardley on 14 August 2017. 20905 & 20096 (newly named Ian Goddard 1938-2016) lead a pair of TEA former oil tankers, with 20311 & 20314 bringing up the rear. This move was in preparation for moving a set of underground stock back to Derby. This was running virtually to time, which just shows how lax the schedule is, as it didn't leave Derby until 08:41 (95 minutes late). In fact it wasn't even activated on the system until 08:30!