Never seem to find it on the National Rail Journey Planner. Used to get flagged up as an option on the old version.
Interesting. With the plethora of ticket products available, there are a number which (whilst they are available) are obscure to buy and I have to wonder if that is intentional marketing or just the sign of a system which some consider over-complex and broken.
Not a London travel card but a local (very local) example. Using the
TVM▸ at Trowbridge, I can pay £5 for a single to Melksham. Or (after the first two trains in the morning, Monday to Friday) I can pay £4.80 ... but taking me to the £5 was one keystroke whereas (and I counted it) took me over a dozen and I had to know the product was there in the first place for the £4.80 price.
Another - Day trip, Bradford-on-Avon to Barry Island, for 10th August - £30.40 adult (before railcard) though I suspect that you'll need to know where to look on the TVM as it will "obviously" offer you only a fare of £34.20. And if you're in a group of 3 without railcards, you may be better advised to buy your tickets on the Great Western portion of the journey with "Groupsave" and the Transport for Wales leg separately.