Hi, I have received similar letters. I parked in a free retail park and left by foot to goto other shops out of the park. On reading the notice at the entrance of the car park, it states overstaying over 2 hours or leaving premises will result in a charge of £70 or £50 if paid within 14 days. However the Parking Charge Notice stuck on my car states £60 or £40 within 14 day...?? That alone is a legal get out point if it it went to court. They are just [problematic] frightening Joe public into paying up. This site assures people that they are not alone.