It's a long story so I won't go into the details of why I need to cancel 24 hours before I travel. They say they will charge the full amount.
I paid with a debit card - which I can easily reduce the available monies to £0 or I can even cancel the card.
The other thing is, if they charge the full amount for cancellation - is there any point in using their cancel facility? I guess all this does is free the space up so they can resell it - which doesn't benefit me at all.
Is there any recourse if I do this?