TPE Manchester Airport Advance during engineering work

I'm looking to travel on the 0635 Huddersfield to Manchester Airport on Sunday 29 March, which is bustituted, apparently due to engineering north of York. (Why they aren't running a train south of York is not explained).

The usual advance tickets (less than a tenner) don't seem to be available, just off-peak walk up tickets (£24.20). While I can understand why they would want to try to restrict demand, the prospect of paying nearly two and a half times more for the inferior experience of an RRB feels like somebody is taking the proverbial. I know I can split the tickets at Piccadilly and save around a fiver, but still...

Is there any chance of advances being released nearer to the time?

Advances are only available on ‘reservable’ services, and RRBs are, generally speaking, not reservable, so no unfortunately.

Thanks for that. Now I've looked into it properly I realise that an off peak return is only a couple of quid more than the two advance singles so I'm not as badly done by as I thought