Every ticket on the app including first class is non refundable. They use to refund as a credit to account. That no longer happens. I understand they changed to policy recently no returns and only singles? Why don’t they do what Eurostar do now £20 change ticket? I know you can get a refund but why can’t they sell these options via the app where is best to complain to about this?
Anytime Singles are refundable. Or if you want a Super Off Peak Single, you might find the destinations of Haymarket, Manors and Reston attractive as an alternative? I hear they're lovely places and are becoming rather more popular in the stats, I can't think why.
The trial has not yet been rolled out to other destinations (e.g. Leeds) and so nothing has changed about the refundability of fares to these places.
However, all tickets LNER sell without exception are
changeable against a fee (I forget if Advance changes are now £5 or £10) unless they're lower than the cost of that fee (won't be many!). They're just not refundable.
(I agree the policy is scandalous and there's a very long thread mostly on the disadvantages of what they are up to!)