happened to me about 13 months ago, they sent me a notice, looked official! was not!, they said pay now costs £60 after one month £90, I searched the internet! took the advice not to contact them!........got another notice with a photo of my car entering the car park, again I ignored it!............Haven't heard another word!...best to ignore them, if you respond they will hound you, if you ignore it willl cost them too much to recover the money they charge!..............