Whilst I do not consider myself to be a conspiracy theorist, I nonetheless begin to wonder, particularly in light of the recent e-mails, whether this is more than just incompetence, and whether one or more members of gateline staff are acting maliciously in knowingly denying travel to a valid ticket-holder.
If so, this might be considered an misleading commercial practice, an aggressive commercial practice, or even harassment, all of which are criminal offences.
If TOCs, including GWR, can prosecute over honest mistakes and 0p underpayments, it would not seem at all disproportionate for GWR to face prosecution themselves over their own crimes; albeit that I am not advising that bnm pursue a private prosecution at this stage, certainly not without taking formal legal advice.
It would, however, seem reasonable to mention these crimes in any letter of complaint to MPs, or to the DfT, and in any correspondence with GWR management.
Agree, this seems to me to be either gross incompetence or deliberate malice.
For the initial "mistakes" a simple penalty should have been payable each time the mistake was made, not strictly speaking a fine, but a penalty for making a mistake.
If however they keep making the same alleged mistake, then that could suggest that they are deliberately trying to get away with dishonesty, and that legal action could be a remedy.
After all, if a passenger travels beyond the validity of their ticket they will often be liable for a penalty fare, if they persist in so doing, then prosecution is probable.