The English rule of 6 regulations are out although are a bit hard to follow as they amend original regulations. The new set are here
This is a link to the regulations for anyone who wants to read the real law on this
The Health Protection (Coronavirus, Restrictions) (No. 2) (England) (Amendment) (No. 4) Regulations 2020
www.legislation.gov.uk/uksi/2020/986/pdfs/uksi_20200986_en.pdf
So I think it means you can meet to cut off part of a baby boy's pe nis but if you are atheists a significant event gathering would not include even something basis like a once a year family meal.
Support groups for new parents and for gay people etc can still meet in more than 6 (and the 30 at weddings etc rule remains).
For those into sport
"(a) a “sports gathering” is a gathering which is organised for the purposes for allowing persons who are not elite sportspersons to take part in any sport or other fitness related activity and— (i) which is organised by a business, a charitable, benevolent or philanthropic institution, or a public body, (ii) which takes place on relevant premises or outdoors, and (iii) the manager, if the gathering takes place on relevant premises, or the gathering organiser, in any other case, complies with paragraph (5G); (b) a person taking part in a sports gathering does not include a spectator or a parent of any child who is taking part in the gathering.