Well. That was interesting.
We had a nice wander around a National Trust place with the 2DS after lunch.
Got back, and as it's such a lovely day, DH and I decided to go for our usual walk around the block, leaving the DS (14 & 12) at home.
We were almost home when we got a call from DS1 - 2 policemen were at the door as they'd had reports of a covid breach at our address 
We ran the last stretch back and had a chat to the policemen, who were perfectly nice, said they could tell it wasn't us, and that someone had probably given a wrong address.
DS1 was a bit freaked out, but had handled it well - even when one policeman said to him "that's a lot of shoes on the floor there" i.e. implying we had visitors (which we were a bit cross about - I don't think they should have continued to question a minor when we weren't there). That'll teach the DS to put their shoes away instead of leaving them all over the hall floor
But anyway. It's nice to know that somewhere at the back of us there are some people who are happy to report their neighbours for an alleged covid breach
. And that they are stupid enough to get the wrong address 