I don't think there will be mass closures again. I mainly just thought it was good timing that this thread appeared in active just as the front pages were released for tomorrow with lockdown headlines.
I think it's possible the 1 week half terms in October and February could be changed to 2 weeks to break the school transmission a bit.
I think it's possible that masks could be reintroduced in some circumstance but it would be hard with nightclubs/festivals etc as unlikely they'll want to enforce mask wearing in those situations.
Personally I'm happy wearing masks in retail/medical/transport/restaurants to seat. Wouldn't see the point in a bar/club as environment is too close, but they're not places I hang out anyway so not an issue for me.
I think that there could be reductions in size allowances for large group events like weddings and for large events like concerts but not down to previous lockdown levels.
It would all be very fine balance stuff, not mass lockdown.