"Adrian" wrote in message
.4...

So why do they insist on running 2 car units on weekday evenings, while
there's plenty of *other* 2 car units sat dark and quiet on the platforms
at Marylebone and in sidings just outside?

That is, indeed, becoming an increasing problem. On Wednesday and Thursday
nights, in particular, it is not unusual to find the post-theatregoing
trains with standing room only.