Appeared to manage it...What is the problem you're referring to ?
Easy enough to stop there, the problem is where to stop, especially if the promised 12 car formations come along in January.
So it's all about which coaches will be platformed and logically it will be the leading ones. Platform 4, Up Relief Line at Twyford is 180 meters long and can't be extended, so in theory, and with new stop markers to suit, an 8 car 387 can be fully platformed but a 12 car formation can't and neither can a 9 car Class 345 (205 m). So there will be a need to advise passengers where to travel, where ever the stopping marker goes.