Yes, they have just introduced parking fees: It's free for 2 hours - then about 27 Pounds for up to 24 hours - then 54 Pounds at the beginning of every 24 hours after that!
Seems like they don't really want any visitors? Or maybe they do - but they do not want them to stay for too long!
But here is the "bargain": You can buy a card valid for a week, at the cost of "only" 5 times 54 Pounds....
ohh...I forgot: Add 25% VAT to that!!