Train Description

S is for Special.
Numbers next to the MET destinations indicate the stopping pattern.

Thank you both

Yeah, the way the way they're given in the timetable is:

A0 is to Aldgate, so that's presumably your all stations Aldgate;
UX0 is surely as you say;
CM0 is to Chesham, so that's gonna be an all stations Chesham;
There's a WF1 to Watford, is that the semi-fast Watford here, d'you think?;
An AM1 to Amersham - semi-fast Amersham perhaps?;
An AM0 - all stations Amersham?;
There is an A5, so that's gonna be your fast Aldgate;
An A2 to Aldgate, maybe this one's semi-fast?;
WF0, presumably all stations Watford;
HH1 - semi-fast Harrow-on-the-Hill?
WP0 - all stations Wembley Park?
HH0 - all stations Harrow-on-the-Hill?

I think that's probably the lot of them, it was the various uses of 0, 1, 2 and then, for reasons beyond me, a 5 that completely threw me.

Gotcha, thanks