What I noticed in Johnson broadcasts Monday night was that he stated mid February and within minutes the BBC had decided this was mid March. No idea why they would just arbitrarily add a month, other than their general MO through all this has been to state worse case scenario.
By breakfast news they'd gone back to after February half term, which is late Feb/March.
If the vaccine is shown to be doing it's job though, they'll look to loosen thing up gradually again mid Feb so ever important 'the economy' can start to turn again. And, more importantly, we definitely have to get children back to school.
I'd personally accepted that January would be a write of before Christmas anyway, it's generally a ****e month with short days and crap weather, easier to accept and deal with restrictions on movement.
The idea that this could run til April though is not a good prospect, and I can't see the Tories buying into that.