I occasionally have to travel from Sandy to London Paddington weekdays during the morning and evening peak periods. My preferred route for doing so is to change onto the Elizabeth line at Farringdon. Getting a return to Farringdon and then using contactless from there comes to about £50. Buying split tickets from SDY-FPK and then FPK-ZFD brings that down to about £44.
I've just noticed that trainsplit will sell me a ticket from Sandy to "London Underground and DLR Zones 1-2" for only just over £37 with the route indicating a change at Farringdon onto the Elizabeth line. The description of the ticket states "Ticket valid for this journey under London Underground interavailability rules". Is this really a valid fare? Am I likely to have any trouble with the ticket opening the barriers at Paddington? I've done some searching on the forum and while there are a few mentions of interavailability on Thameslink routes they only mention it when travelling between Finsbury Park, Kings Cross and Moorgate.
I've just noticed that trainsplit will sell me a ticket from Sandy to "London Underground and DLR Zones 1-2" for only just over £37 with the route indicating a change at Farringdon onto the Elizabeth line. The description of the ticket states "Ticket valid for this journey under London Underground interavailability rules". Is this really a valid fare? Am I likely to have any trouble with the ticket opening the barriers at Paddington? I've done some searching on the forum and while there are a few mentions of interavailability on Thameslink routes they only mention it when travelling between Finsbury Park, Kings Cross and Moorgate.