Cheers for the advice guys. Have any of these Mickey Mouse firms ever successfully taken anyone to court and won?

Why are these parking companies employed by the car park owners if they know they are [causing problems]?

Today I received a £100 (£50 if paid within 28 days) 'Civil Parking Charge' from A/COVERT SECURITY SERVICES LTD. This was for parking at the Galleries Shopping Centre in a car park that used to be free for all to use, however in recent years parts of it have sprouted signs stating that only permit holders can park there. As I arrived at Asda at the Galleries there was a queue of cars to get into the car park, therefore I drove into the section across the road that is meant to be for permit holders. This car park is relatively empty as it's quite a walk from Asda but I don't mind that. There are very clear signs upon entry stating that it is 'for the use of permit holders only'. I parked there thinking "It's Saturday, this car park is for the offices, dentists etc and not really needed today, no-one will be patrolling etc". However 20 minutes later I returned to find the 'Parking Charge' stuck to my window. It states 'Notice of breach of parking conditions issued by A/COVERT SECURITY SERVICES LTD.' At the bottom of the ticket it states 'This ticket has been issued under theBPA code of practice' The 'Breach of Contract' that I have committed is 'Parked without clearly displaying the required current valid permit'. I'm assuming I should just follow the advice and ignore it. If I receive any letters from them just reply using the templates? Cheers