The Welsh Government's Coronavirus (COVID-19) guidance is on https://gov.wales/coronavirus
I have posted the link above so I can find it easily in future. I don't think it should change. Unlike the guidance itself. Living in London with family in Wales.
The English guidance is on https://www.gov.uk/coronavirus. It looks like I won't need a COVID pass at the theatre on Thursday, though I had better check as January 27th is the actual day the regulations change. It is such a pain in the neck keeping up with all of this.
I still can't visit Mum though as far as I can tell, as the home is only allowing Essential Visitors and my sister has got the nomination for that. That at least was the situation on the nineteenth.