Thanks RailRanger. I know about brfares.com, but it doesn't explain why a given fare exists (that's not its job).
For this flow I can see no reason for separate fares to exist via Lancaster and via Carlisle, and I believe this anomaly results in Virgin's web site selling two singles where it should sell a return.
That's really naughty, it's not clear what you're buying (thetrainline and southern don't do it - they give you the return options - fairly prominently with trainline, and very preominently with southern).
However is this really related to separate via Carlise/Lancaster routes, or is it just Virgin doing something really bad? They do the same thing with Manchester to London, but that may actually give you a return (it's not clear to me what I'd be buying).
In small print:
"The results above show single ticket prices, based on the fastest available journey, to offer more flexibility to our customers. If you are making a return journey, there may be a cheaper fare available, particularly if you are travelling with a train operator other than Virgin Trains. Please click here to check if these are available for your journey."
More flexibility? Hah!
If you click that you then get a choice
Off-Peak Return Via Lancaster £100.40
Off-Peak Return Via Carlisle £100.40
Off-Peak Return Via York £128.00
Manchester to Perth interestingly shows up Out from MAN, back to MCV, perhaps that would affect what tickets are shown?
Moral of the story,
never use virgin's website to book a train, not good to encourage such behaviour.
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If it is because of the multi-route, it is surely cockup-not-conspiracy, I can't see the amount that virgin get out of people who errantly expected a proper SVR rather than two SVHs on specific Manchester-Scotland routes to be worthwhile.
Why do Virgin have a different interface for "mostly Virgin" routes like MAN-PTH and MAN-EUS, but a trainline style interface for say Norwich-Hull?
brfares lists MAN-PTH as "via Carlisle" first, then "via Lancaster" second, I assume the Virgin software picks up the Via Carlise as
for a given train the fares:
- show cheapest advance, if two fares available for same price default sort (alphabetically)
- show cheapest offpeak, if two fares available for same price default sort (alphabetically)
- show cheapest fully flex, if two fares available for same price default sort (alphabetically)
For PTH-MAN there is no via Carlisle route.
Other sites (like Southern), show two SVR tickets, and you can choose either one.
MAN-Inverness/Wick/Aberdeen and back are via Lancaster. MAN-Glasgow/Edinburgh and back are via Carlisle. Perth and nearby stations (Gleneagles, Dunkeld) is sort of on a border between the central belt and the north, I wonder if historically the fares were set by two different groups, and Perth had both routes loaded, at least in one direction, and they can't be removed due to some agreement?