I'm not quite sure where to even start, in trying to reply to that one.
Dear Robert,
Thank you for using the train from Chippenham to Exeter.
[snip]
I have to admit to waking ever so slightly ashamed of myself.
The mantra behind this forum is to help people who are not [all that] familiar with things railway as they wrestle with the absurd puzzles of the system - and not to make any fun of them when they don't use the right company name or are disappointed at something we take for granted. It's somewhat different when we tease back and forth amongst established members. Yes, I know that "Robert Knight" isn't a member here - but he could be, and as we're posting in a public forum he could find the answer or be pointed here.
Robert - I hope you'll use the train again. And please ask us if you've any questions ahead of time, report back on your journey to give us the opportunity to explain, comment, perhaps suggest for your benefit and the benefit of other readers.