If any service from Openreach is available, strictly speaking , you either take that service, even if it’s not as fast as you would like or you pay ETC , what’s more unless a faster alternative from someone else is available, it’s irrelevant anyway …however there have been examples on thus forum where a lister has been advised if this , basically take the speed available or pay ETC and use the alternative (Virgin or whoever ) only for the poster to return saying they were excused the contractual obligation because FTTP wasn’t available…so basically you need to ask , you may be excused you may be held to term
Finally , if FTTP is so important to your situation then presumably you should have checked availability before agreeing to move to the new address
