Ali85 I can't find anywhere that says isolate for 14 days after contact
with someone you don't live with
Obviously it would be safer, if you possibly can, e.g. retired, SAHP should do so, imo
but the country would grind to a halt if HCP and other workers did this^every time.
Just this re infected household members:
https://www.gov.uk/government/publications/covid-19-stay-at-home-guidance/stay-at-home-guidance-for-households-with-possible-coronavirus-covid-19-infection
"If you live with others and you or one of them have symptoms that may be caused by coronavirus, then household members must stay at home and not leave your house for 14 days
(more information in the ending self-isolation section below).
If possible, you should not go out even to buy food or other essentials, other than exercise, and in that case at a safe distance from others.
The 14-day period starts from the day when the first person in your house became ill."