I can't see it being allowed in T2 and T3. Doesn't make sense with the rest of the restrictions.
And TBH it is looking more promising that we might get a working vaccine in the next 6 months. I'd be waiting.
I just hope the first round of people who get it do it properly. Get the dose, keep isolating / distancing for the 2-3 week period for antibodies to develop, 2nd shot etc. Actually follow the instructions.
Then maybe - just maybe we might have a good summer next year.