I have looked into it, the problem is as with most of the uses of clubcard vouchers is that they can only be used against full price of the item and can't be used in conjunction with other savings. So for example, I can use them at local theme park but I can get vouchers for the park which save 30 to 40% so makes me wonder if its worth using the vouchers for that. Same with airmiles, 1 point = x airmiles. I needed to use £500 of vouchers to get a flight which cost £500 full price but I could find discounted for £350.