Because of a lack of electrified siding storage at Didcot, every weekday there are three early morning Swindon to Didcot GWR EMU empty stock workings, with corresponding return workings late at night. On the misty morning of 15 July 2019, 387172 & 387174 pass Uffington with the 5P06 05:40 Swindon Cocklebury to Didcot Parkway ECS, running 12 minutes early.