DCR 56311 became the fourth member of the class to work 6Z91 after 56303 failed the day before at Calvert, prior to departure. It seems that 31190 and 56311 were dispatched from Washwood Heath on 5th February, 31190 to rescue and return 56303 to Washwood Heath and for 56311 to take over the train at Calvert. Here running slightly early on the booked times, but actually almost 24 hours late, the 10:53 empty flyash train to Didcot Power Station approaches Islip station at 12:06 on Wednesday 6th February 2013. There is now a considerable workforce based in the compound at Islip involved in initial tree/vegetation clearance in conjunction with the Evergreen Three upgrade work. Digital Image No. GMPI14193.