I'm sadly having to agree with the majority here
my son is a TA in an Academy run primary in an inner London borough where cases continue to rise .
A "bubble" is a whole year group of 3 classes ..Lunch time = sandwiches in classroom supervised by dinner ladies while the class teachers are in staff room .
The school has an unit catering for children with additional needs ( mainly autistic ) .These children spend some time in their year group's class and some time in intervention groups of mixed ages .
A member of class room staff team went home sick on a Tuesday because of uncontrollable coughing .
Confirmed positive on the Thursday . Is in hospital v unwell .
School still open ,no bubbles isolating at home .
Parents sent letter saying " there has been a confirmed case within the school...advice sought from the Academy trust ,the London Borough ,PHE and DoE ...we have been told no further action needs to be taken "
It goes on to list the most common symptoms of the virus as
new continuous cough,high temp., anosmia .
And I understand that parents have been told of fines for keeping children off .