Thanks for the advice guys I will update the thread as it unfolds as I think it would be useful to others in few months to see that the demand letters eventually stop coming - fingers crossed

Today 12/01/2013 I have received a Parking Charge Notice from Parking Eye stating that I over stayed a 2 hour parking by 11 minutes! The car park is for The Range and Halfords Fleming Way Swindon stores I regularly use however, hadn't noticed the minimum stay. If I pay in 14 days by 23/1/13 its £60 as opposed to £100. Basically do I pay it or ignore what seems to be a ridiculous amount of money for overstaying by 11 minutes? They have attached picture of my licence plate arrving and departing. Many thanks in advance for your comments and suggestions