I think it will be a VERY slow relaxation and withdrawing of restrictions from Easter through to the Winter. We really can't afford to relax things too quickly and end up with rising infections/deaths again.
The restrictions which will stay the longest are the things which can be controlled and policed, i.e. physical premises, etc. They may not all be high risk places, but they can be "controlled" by police, local authorities, etc.
I really don't think Rishi will do anything so stupid as "eat out to help out" again, and I don't think Boris will be telling people to go back to work on public transport! Hopefully, they'll have learned the mistakes of opening up too quickly.
Whatever re-opens, such as for pubs/restaurants, social distancing, drinks only with meals, limited numbers per booking, screens, taking details via track & trace etc., will be the "norm" for most of the rest of the year. Same with shops, many types will be pretty quick to re-open maybe after Easter, but social distancing, queues, masks, click n collect, screens at counters, etc will be with us most of the year.
I think public transport will continue to be operated at much lower levels, but with longer trains (where possible) for most of the year too. (I understand that local circumstances will dictate, i.e. where there are lots of commuters, you need more or longer trains to allow for social distancing).
Can't see schools re-opening until after Easter. Maybe back to restricted year groups between Easter and May bank holiday, with an aspirational hope to return to normal after the May bank holiday (but more likely no return to fully normal until September).
It all depends on the numbers of infections, hospitalisations, and deaths. We need several weeks of sustained falls back down to pretty small numbers, which probably takes us to March/April, and then "baby steps" of relaxations to ensure they don't start to rise again when things are re-opened. We need to maintain low levels via social distancing, restrictions, etc., until the majority of working adults have at least their first dose of vaccine which looks to be mid to late Summer.
I'm pretty optimistic about most things being open by September, i.e. shops, pubs/restaurants , schools & unis, etc, but with some social distancing, masks, etc still in operation in small/confined areas.