Litebulbs,
Considering how many people have applied for VR and part time, I doubt CR will come into it unless any "official" or "unofficial" industrial action is brought forward.
Considering there are about 50 applications for VR at LGW alone (out of 1200 crew), I reckon the company will find the 2000HCE that is needed.
For those concerned about the winter schedule and how it can be crewed with 2000HCE less than now, there are plenty of aircraft being put to bed (as it were) and reduction in crew levels on board.
Gg