The first Turbo unit to enter traffic (165001) has nearly two decades of service behind it when pictured here on 24 May 2010 working the 10:38 Aylesbury to Princes Risborough service. It has taken over from 55020, which worked the earlier trains, and is pictured here approaching Little Kimble. The line will continue to see this relatively modern traction until the evening peak, when once again the vintage Class 121 unit will be brought out.