56312 failed at Aylesbury whilst working the previous evening's 6Z81, 18:26 empty spoil train from Calvert to Willesden Euroterminal, but was moved, somehow, back to Claydon L&NE Junction loop where it remained overnight. 56091 had worked the final outward loaded flyash train, 6Z92, from Didcot and after this was unloaded on Friday morning it shunted the empties into the south sidings at Calvert and then ran light engine to Claydon loop to rescue 56312 and its train. 56091 is coupling up prior to departing as 6Z91, 11:31 from Claydon loop to Willesden Euroterminal via Oxford and the GWML. 11:15, Friday 14th June 2013. Digital Image No. GMPI16038.