I doubt if any Challenger 2 will come out because even if they are not going to put them in storage, they will be a cheap source of spares for those remaining.
Presumably very few are actually now with units, most being in storage.
From memory they re-engined the best part of 1000 FV432. What possible use could there have been for that number even before the cuts. These will start coming out in unissued condition. I wonder if people will be able to licence them for the road.