Very handy series of graphs tweeted tonight by @President_MU; come closer to the granularity I was looking for (cheers @hispanita!).

Look at the 'Cases by Outbreak Type' graph especially. How on earth can we open schools with these trends?

https://twitter.com/President_MU/status/1295851284659044354 https://twitter.com/laineydoyle/status/1295885724600999937

Would be very interested, especially, in knowing what qualifies as an 'isolated' case. Does this mean it has no known connection to another confirmed case? In which case, can it be used as an indicator of transmission of the virus in the wild? ( @President_MU?)

Would also be very, very helpful if the full figures & breakdowns could be made publicly available on the Covid 19 Data Hub.

I still can't answer the simple question: what % of cases in the last week were transmitted in the community (rather than connected to an existing case)?

I've had quite a few people say to me recently that community transmission was sticking to 31% which - given the information in @President_MU's graphs - is obviously misleading.

Community transmission (as defined to include isolated cases not part of clusters) seems to be increasing enormously. This affects the balance of risks for opening schools in a huge way.