Though when was this? I didn't think LU ticket offices have been able
to do such refunds for a long time.


This is inconsistant and seems to depend on the person in the ticket office

I got a £5.00 at Marylebone reduced to the correct £2.20 only about a
month ago at the LUL ticket office BUT only a few days later a notice
appeared informing pax that they were not ablle to cancel Chiltern max
fares

I was told at one particular station ( not Marylebone) that they will
always do this if they can because quite often when they ring up the
help line they are told "just do it anyway"

My reading of the situation is that the ticket offices can do more
than they pretend as it is easier to say can't than won't but that it
is always worth trying

HTH Phil