Some quotes from the bbc lead article on this
There are some exceptions to the new rules. Households and support bubbles bigger than six can socialise together - but not with anyone else at the same time - and gatherings can be more than six if it is for work or education purposes.
What counts as educational purposes? Is this just school?
The Archbishop of Canterbury, Justin Welby, said the new rules did not affect places of worship as that is "not a social gathering".
And Parkrun - which earlier this week announced it was to resume in England - is "unaffected" as it is an organised sport, its organisers said.
No 10 said any group of seven or more people gathering anywhere "risks being dispersed by police or fined for non-compliance".
BBC political correspondent Nick Eardley pointed out that pubs and restaurants would be allowed to have more than six customers inside, but that the groups of six would have to be socially distant from each other.
The rationale behind allowing this, but not allowing larger groups of people inside other people's homes, is that businesses can only be open if they follow safety and hygiene measures set out by the government, he added.
Which does sound generally promising.