I’m not expecting much easement of restrictions for social gatherings until after 14th March (Mothering Sunday). The rise infections caused by Lots of people meeting up that day last year was one of the triggers of the first lockdown.
Though education and business activities could be eased before this.
Last year, Mother's Day was on March 22nd, two days after pubs and restaurants were closed, and one day before the lockdown started. So I can't see that Mother's day was not one of the main triggers for the first lockdown.
I would expect to see some easing of restrictions in February, if the vaccination target has been met, or is close to being met, and the figures for cases, hospitalisations and deaths have stabilised.
What could happen is the whole country is moved down to Tier 3, the main effect of which will be to see non essential shops and leisure centres re-open.
Then some time in March, on or near the time of the budget, or perhaps the anniversary of pubs being closed, the whole country is moved to Tier 2, possibly with a change to the definition of Tier 2 to allow pubs to open without having to serve meals.
Then Tier 1 could come after Easter, to precede the current end date for the furlough scheme.
The all remaining restrictions could be eased in stages over the summer.
I also hope we learn the lessons of this year, and make sure that school pupils, students and staff are prioritised for vaccination over the summer, so that there is no repeat of the situation where a return to education in the autumn is a trigger for a new wave of cases.