I don’t think they’ll hold back any, it’s clear there’s a huge demand, the question is whether another big shipment will arrive this year. Not sure when that would get confirmed
Managed to get a digital one (me) and disc one (present) from Argos (stayed up until 1am, gave up and gave it a half-hearted check at 6am and lucked out).
In terms of big retailers left to pre-order from, John Lewis haven’t released their allocation yet so worth checking there regularly.
I also ordered a couple from Scan (whilst waiting for Argos and starting to panic :p ) but I don’t think they have an allocation though as it said they were guaranteed to be fulfilled on release. Going to cancel that shortly though now my Argos order has gone through