Good grief, tier 4 (not where I am) and changes to Christmas mixing all in one day
Many will stick to the rules,however difficult, but I suspect many won't.
All along, we were only having MiL on Christmas day (she has alzheimer's and is bubbled with us anyway due to needing significant support) so not much has changed for us. I was hoping to have my parents on the 27th but that can't happen now 
Started a big house tidy/clean today - need to finish off tomorrow. Also need to go to the garden centre for one last present.
Trying to think of nice things to do with DS(7) over the holidays to make it as nice as possible.
He wants to watch home alone 1&2 so will make a home cinema at some point.
We have some minecraft lego to build from his birthday plus we have bought him some more for Christmas so we will do that.
Board games - we have some and have bought monopoly for Christmas.
Local walks if it's nice enough. We are lucky to have walks literally out of the front door.
Not sure what else. To be honest, I think he will just be happy to have time with us at home.