My DH, apparently! I thought most people had deleted it, or at least turned off the tracking thing. But he has just been pinged. Again. Says he was a contact with someone on 29 December who has now tested +ve. Except he didn't leave the house at all on 28th or 29th, or see anyone other than me (and my parents before they left on the morning of 28th, and they definitely haven't tested +ve).
This is the 3rd time he's been pinged - maybe this one will finally convince him it's really not fit for purpose...