Just that really.
We usually get together as 4 households, but 2 are in a bubble so it’s technically 3 getting together. This includes adults, school-age DC and two other elderly people (other side of family).
MIL is in her 80’s (FIL deceased) and will only say you all decide what I should do. SIL normally hosts but DH is feeling very uncomfortable exposing their DM to everyone. SIL will go berserk if we say we are not going to come on Christmas Day now (she thinks Covid is a load of rubbish).
We are a mix of Tier 3 and 2.
The BBC News is currently reporting that the new guidance is expected to say avoid elderly relatives.