It appears that if you’re in England and have a child under 1 you will be able to form a support bubble with another household from Dec 2. Doesn’t matter how many other adults are in your household. It can also be across tiers.
This also applies if you have a child under 5 with a disability that requires ‘continuous care’.
Source - The BBC www.google.co.uk/amp/s/www.bbc.co.uk/news/amp/health-52637354
You can also find the info as point 10c of the Covid Winter Plan on the gov.uk site
Sorry if this has already been shared, I haven’t seen it but may have missed it in which case I apologise.
I hope it’s good news for some people, it is for us.