Need legal advice re rubbish at a civic amenity, if they take your car registration what happens?

I work part time as a merchandiser. i took some company posters to recycle at the local tip. an operative at the tip told me i was illegally dumping comercial waste i explained that i was unaware of any wrongdoing i apologised and took my posters away. i asked where i could take them. he did not really answer but took my car registration number and told me i could never return to the tip again. i did not sign anything or give my name but i think there is some cctv at the site. what will happen now?
Answer
Your details will be held on the database - if you offend again you will either be fined or receive a summons through the post. its all part of blairs big brother britain. commercial waste has to be paid for to dispose of xxx