so the 29th Dec, as flagged on here, is currently sitting on 79.8k cases for the UK. At the moment that is all likely to change given the dashboard is looking a little wonky in terms of dates at the moment but you cant see it going down!
that wont exclusively be christmas get togethers, of course there'll be the 'normal' transmission vectors that have been occuring all year, of a more transmissible variant, plus the delay of people getting ill in the run up to xmas and showing symptoms in and around xmas and not getting to a test centre etc, so the whole holiday period is a bit of a muddle, but the spike around 29th to 31st will be quite large and clearly Christmas day will have contributed some.