I live in a big old Victorian house split into 5 flats
Lass in the top flat e mails us all to say her boyfriend has tested positive for Covid and is poorly sick in bed. She warned that the bluetooth part of the App would doubtless signal us through the walls and ceilings.
It did. All the others are youngish and work from home and have only had one jab. They have been ordered to isolate for 10 days. Now I have.

I am not