@Simon2742 I agree with @Mike-And-Jane0 here, & disagree with @Helen3
The new' Rule of 6' must surely trump the previous '2 households rule', as it has stated that SIX may congregate under one roof from any number of households.
- I myself let spare rooms in my own house and currently have a single man and a couple (unconnected) staying. So guests + me = 3 households! (Until the liberating Rule of 6, I was only letting one room at a time, as that one household + me made 2!)