I did that the first year at Prestatyn, took them an hour to go through the list because there was fuck all in the chalet that should have been.

Neither do Neil and I and we don't have credit cards!!!!

I knew it was in the TnC I'm ex travel agent so always check them but Pontins never enforced them

Then as they havnt inforced it before they cannot just announce it 2 weeks before the event!!!

Its disgusting!!! talk about short notice, we do not have that kind of money available at the moment, so what do we do? put tent up out on the lawn!!! even though paid in full for the chalet!! not happy!

If it's in the T & Cs they can enforce it...short notice or otherwise. Is it worth seeing if Fleur can talk to the venue to see what can be done

So let me understand, if I use a card is this £100 going to be taken out of my account and refunded a week or two later? What money am I going to spend at the festival?

No, its just a pre-authorisation should your chalet be damaged.

Sort of like when you open a tab at a bar they take a swipe of your card to stop you running off without paying

The only thing to be aware of is pre-authorisations count against your credit limit - so whilst the money is not actually taken from the card, neither is it available for your use until it is cancelled.

so you have to have the money available - at least £100 on the card, and if its all you've got you can't use it until it is 'refunded'.

If that was posted as a question, then the answer is "yes".