Well, that's the first you've mentioned that the TOC▸ was operating its own T&Cs...don't expect informed help/comment without providing the full facts?
I'm not sure the additional information is the slightest bit relevant to my initial query and Grahame managed to answer it without the need for the snarky comments.
Please try and remember that not everyone has your knowledge of how railways operate, tickets are sold etc. It should be about making things easy, understanding where the vast majority of passengers are starting from as we're not all 'enthusiasts' and perhaps helping them? So far your contribution has been less than helpful.