Given the England flag in their name I'm guessing the UK.
I don't think we had any social distancing restrictions during any Christmas but some did come into effect shortly after, I don't think people were allowed to visit. I remember us having a new year's party with our neighbours in the back garden, technically them not allowed to go into our house and having to stay 2 metres from them. Must have been December 2020.
There was a scandal that Boris Johnson held a Christmas party, when he told everyone else to not meet up. Wikipedia tells me, you guys had social restrictions during Christmas in 2020.