Having worked down on the rear of 2A05, 172 101 now returns as 2H15, the 07:20 from Aylesbury to Marylebone, part of the 172 diagram from the start of the new timetable. It is just arriving at 07:37 a couple of minutes after a loco hauled train had passed on the through line and already has a yellow signal to proceed. Monday 5th September 2011. Digital Image No. GMPI10262.