Article doesn't say they are considering it, they are saying Labour are calling for it.
I would think it is likely they will wait until the impact of schools returning is clearer, before assessing impact on next years exams.
It would make more sense to take time to make the right decision than an announcement which is prone to change. IMO if they do push dates back it won't be far as there are just too many dependencies on results being available in early/mid August, but I wouldn't be making plans for next summer just yet!
Scotland, so far, are saying exams will be on schedule, but are consulting on reducing some elements of some subjects to give more teaching time without impacting the credibility of the results (i.e. reduce English coursework to one essay instead of two/remove speaking component, remove written assignment from French to give more focus on reading/listening/talking, no changes to science/maths etc).