
"If you live in a Tier 4 area, you must follow the rules below. This means that you cannot leave or be outside of the place you are living unless you have a reasonable excuse. You cannot meet other people indoors, including over the Christmas and New Year period, unless you live with them, or they are part of your support bubble. Outdoors, you can only meet one person from another household. These rules will not be relaxed for Christmas for Tier 4 – you cannot form a Christmas bubble in Tier 4"
So can't do anything basically, except get some fresh air! What an excellent Christmas day to get sunshine, and crispy fresh cleaner than normal central London air with amazing views of the Thames, Tower of London and Tower Bridge.