On the first day of Chiltern's new timetable, 172 101 brings up the rear of the 06:00 from Marylebone to Aylesbury via High Wycombe, with 165 037 the leading unit. They are departing from Princes Risborough a few minutes late at 06:56 on Monday 5th September 2011. Whether this will be a regular turn for a 172 unit, I don't know! It seems that this train, 2A05, is a scheduled working for a 172... Digital Image No. GMPI10251.