If there is significant disruption to this autumn term (the longest term, where a lot of the teaching is done), then they will need to look also at changes to the 2022 exams, because those going in to years 10 and 12 stand to lose the very start of their courses.
If exams are slimmed down, then the start point for the next tier of education will be different too. Because although there is always the odd topic that might not have been covered well, it's quite a different task to patch that compared to dealing with larger gaps