Our booking engine at tickets.railforums.co.uk (powered by TrainSplit) helps support the running of the forum with every ticket purchase! Find out more and ask any questions/give us feedback in this thread!
Could an excess from a York - Scarborough Off-Peak Day Return (CDR) to a York - Bridlington CDR be bought even though York - Bridlington fares are only valid via Scarborough for interchange purposes because of an easement?
If it is a valid route, yes, you can, but only before travel, or, if there were no facilities to do so there, at your first reasonable opportunity after boarding a train.