55020 (121020) looks a little lost in the landscape as it passes Fritwell on 11 October 2010 with the 5M21 10:08 Kidderminster to Aylesbury ECS. It is returning from the Severn Valley Railway, where it had taken part in the Diesel Railcar Reunion over the previous weekend. Although this is a Chiltern Railways unit on a Chiltern Railways operated line, this vintage vehicle would not normally be seen this far north, as it is primarily used for peak hour shuttle services between Aylesbury and Princes Risborough.