My wife just had a notification from her iPhone COVID-19 app - she had been in close contact with someone who tested positive on Thursday.
So, she will be self-isolating until one minute to midnight Sunday 27th June, and we are off to get a PCR test at 2pm today (both of us, even though I haven't been contacted).
Luckily (unless the PCR test comes back positive), I don't have to self-isolate, so the dog will still get walked - no trip to my daughter's tomorrow for Fathers Day, though, as I won't leave my wife on her own while I get treated to lunch.