caveats as above!!! I always worry that I might cause people real issues if they follow my advice when I'm just a person with a bit of a weather obsession. I'm certain that if people from weather forums were to peek in here they'd be rolling their eyes at me.
If it were me planning (as indeed I am a bit) I think I would try and carry on as normal for the majority of the week, adjusting plans if needed according to new info. There may well be some disruption, it's just too tricky to know where. You might be in a village that can't get out to go to school, while people in the next village along accuse you of exaggerating!
For much of England and Wales I'd be wary about Friday. Lots of models have been showing blizzards quite consistently from Thursday midnight or so onwards. Some of the models are showing this turning to rain on Friday, perhaps for a time, perhaps for a prolonged time.
However, if it does turn to rain, at the moment I think there is a reasonable risk of it turning to freezing rain, as although the upper temperatures warm, it would still be falling through a very cold boundary layer (the air closest to the surface) . I've not seen this being forecast anywhere, it's just my feeling.
So the options for Friday at the moment (and this will change ) are:
-blizzards
-heavy snow turning to rain
-snow I think turning to freezing rain.
The extent as to which all this this moves north, I'm uncertain.