London Midland 172 units Nos. 172 221 and 172 332 were on mileage accumulation runs on Friday 4th November 2011, including over the Chiltern line between Banbury and High Wycombe. 5Z02 was the return run from High Wycombe at 12:56, here entering the platform line at Princes Risborough at 13:04, where it was held for a non-stop northbound Chiltern service to pass it. Digital Image No. GMPI10545.