yep...
checked their T&C (can't copy n paste - but go to help menu and look at payment).
they say you pay FULL price in "stage 1"
then, they review the discount voucher and IF it was correctly allocated to you AND used correctly, they WILL refund the difference before the item is dispatched "stage 2"
Got a nasty feeling none of us will reach stage 2. This has happened before! My order is showing full price pending from my card, not the price agreed on the checkout! A con, but then you do tick "I have read T&C" before you order!
Think I may cancel my order... This seems a little bit underhand, as they agree the reduced fee at point of sale, but the T&C hides this 2 stage payment where you pay in full, then get your discount back. Best bit is, though, that as an internet sale you are ENTITLED to a full refund if you return it in 7 days unopened (law). So if they do not honour the voucher, send it back!