Thanks for posting, TonyC - and welcome to the Coffee Shop forum!
I've placed your request here in our 'across the West' board, where it should hopefully gain the highest readership.
Also, you may find a lot of the previous posts in another discussion topic on this forum of interest: for
current comments, from
here onwards.
However, the
previous 60 pages of that particular topic also contain many gems of wisdom, in which I would like to think First Great Western would / should be interested.

Hope this helps!
Regards, Chris from Nailsea.
