Amersham must be one of the few stations to receive a
relatively poor peak service compared to off peak.

You're right - the only others I can think of off the top of my head
are Rickmansworth and Cambridge.



Victoria to Brighton.

London Bridge to Brighton.

Lewisham to Charing Cross (and in the non-peak direction, no service at
all to/from Charing Cross on Dartford lines).