"Interestingly, 25% already tested positive for antibodies at the start of the study - March 26."
Anecdotally - I live in a city outside of London.
My friend was ill the last few days of Feb, she had a routine hospital procedure a few days later (end of Feb) which kept her at home afterwards for a few weeks
She lives with her mother who was told to shield and so was also at home during this period , first looking after my friend as she recovered from the procedure and then as a shielding person
Neither of them left the house for 14 weeks except to go in their garden.
Both are positive for antibodies and friend is certain that the sickness/breathlessness/cough she had in late Feb was covid
At the time we officially had no cases locally and she had not travelled to Italy etc.
Is there any stronger evidence now for when community transmission began in earnest in this country?