I have. It said “You have an overdue Penalty charge notice, today is the last day you can get a 50% discount on your fine…” There was a link which took me to a what looked like gov.uk page, but the web page address was not gov.uk. You had to put your number in to retrieve the details of the penalty charge which I probably unwisely did. Something came up giving the date of the penalty charge as 18 Sept but no location details. We were in Sweden on that date and the car was parked at Heathrow short stay!
Just wondering if anyone else has had similar.