I noticed just now, while whizzing past on my Chiltern Clubman, that the Central Line's Ruislip depot is extremely full
All the trains are neatly lined up - I have never seen the depot with so many trains.
Ah! That'll explain it. Just checked - no trains West of Marble Arch
Have now just gone past chiltern's Wembley depot. That has just one 2 car Turbo (165) train and lots of Mk 3 stock. Ah! And that could be because for the first time in yonks, Chiltern are playing with a full train set this weekend.
For the avoidance of doubt, Chiltern Railways have no engineering work this weekend.