59001 on
7A97 (Merehead Quarry to Colnbrook Foster Yeoman)
GWR Sleeper 57s are notoriously difficult to track down, however 57605 worked the Down service to Penzance out of Paddington last night with
57602 the ECS loco on the rear - which was dropped off at Reading. I believe this would probably make 57602 one of the 57s you saw taking in the stock today. 57604 is a different livery to the others (
https://flic.kr/p/X775PL) so could be ruled out if you got a good look at it. 57603 being the 4th green 57 option.
59005 on
7A15 17:05 Merehead Quarry to Acton Terminal Complex
70014 on
4O29 15:12 Trafford Park Freightliner Terminal to Southampton Marine Container Terminal
66093 is the current shunt loco in Hinksey Yard and the only one there this evening, so reckon you're right with that one.