The Department for Culture, Media and Sport have changed the guidance so that it now reads professional and non-professional groups can now rehearse.
This week (Monday) the Church of England and the Roman Catholic Church have issued guidance allowing (small) choirs to sing during services - though not yet allowing congregational singing. The latest guidance document has obvious inconsistencies, or at least confusing parts** Nonetheless it is clear: As of 15 August [ ] musicians [ ] can resume training, rehearsals [ ] where organisations wish and are able to. Additional mitigations, such as extended social distancing, were previously required for singing, wind and brass given concerns that these were potentially higher risk activities. DCMS commissioned further scientiﬁc studies to be carried out to develop the scientiﬁc evidence on these activities, which has allowed us to reconsider appropriate mitigations. Both professionals and non-professionals can now engage in singing, wind and brass in line with this guidance. People should continue to socially distance from those they do not live with wherever possible. Venues, performers and audiences should ensure 2m distancing applies wherever possible. It goes on at great length (there are 47 pages in the document) about the arrangements which need to be in place. It covers all aspects of performing arts - actors, dancers, stage-crew, front-of-house staff as well as singers and musicians. If you really want to read the document there is a link below.
** In places it talks about social interactions being limited to a group of no more than two households, but obviously this doesn't mean the choir can only come from two houses! It is obviously referring to the socialising aspect of rehearsals - so there won't be any tea breaks, and the hugging of long-missed fellow choristers when we return won't be allowed! It was the socialising aspects of rehearsals (not the actual singing) that created the story "THE CHOIR THAT GOT ILL" which started all the negative press about choral singing way back in March.