Interesting! Some GWR Oxford to London Paddington fasts diagrams are being run by a 6-car Turbo instead of a 5-car IET!
One diagram was a 6 car Turbo, finishing at Reading after attaching with the Greenford 2 car and running ECS. I believe this was due to 802114 being swapped with 165101 on 1A01 from Bristol Temple Meads.
Two diagrams (one diagram per unit!). 800018 had failed at Oxford the previous evening and the defective end had to be ‘boxed in’. This left a unit short for a Paddington departure Sat morning so it was arranged with Reading TCD to provide 165101 & 165104 to run the Oxford / Paddington services.
1D14* / 1P14* / 1D20 / 1P20 / 1D26 / 1P26 / 1D32 / 1P32 / 1D38 / 1P38
*165101 only, then 104 attached for remainder of workings.
As noted, the 6 car then attached, at Paddington, to the Greenford 2 car to run ECS back to Reading TCD.