I am noticing for the past few weeks, all but one Windsor diagram 8-455, with one 10-707, and then Weybridge a mixture of 8-450 and 5-458, with one 10-707. They’ve cut the Hounslow loop.
Shepperton appears to be a mixture of 455s and 707s despite being booked for ten cars throughout - this was the route 707s were supposed to be concentrated on after the cascades to SE began. Several 5 car 458s creeping onto the line these days.
Reading seems to have given a third diagram over to 8-450 as well, with many 458s short formed to 5 cars recently.
They’re severely short of 10 car units, now only having ten 707s and thirty-two working 458s, whereas this time last year there were thirty 707s and thirty-six working 458s. 450s and 455s are having to cover an enormous amount of formerly ten car services, and the only way they can manage that what with the 455s all slowly going bust is because they’ve kicked the Hounslow circle, halved Dorking, Guildford via Epsom and Shepperton, and used double 456s to cover for 455s on the Wimbledon side.