Real-time train running information for 1H54 1900 departure from Scarborough to Sheffield on 03/08/2022. From Realtime Trains, an independent source of train running info for Great Britain.
www.realtimetrains.co.uk
It did run but 74 minutes late, calling at Cottingham at 2124.
However NRCoT condition 30.1 provides that:
You may return an unused Ticket to the original retailer or Train Company from whom
it was purchased, where you will be given a full refund with no administration fee
charged, if you decide not to travel because the train you intended to use is:
• cancelled, or
• delayed, or
• rescheduled from that in Published Timetable of the Day after you have purchased a
Ticket or Tickets, or
• your reservation will not be honoured
Note it doesn't say what constitutes "delayed", but there'd be no debate that 74 minutes clearly does!
Therefore you should go back to the retailer's customer services and ask them for a refund on that basis. Make it clear that they did not travel. You'd probably get away with sticking in a Delay Repay claim which would give you the same full refund, but that isn't the proper way (that's only if you
did travel) and could cause issues.