Are eGifts just for whole denominations?

Snip isn’t just for whole amounts such as £5, £10, £20 or £100. Most of the eGifts (but not all) can be used for the exact cost of a shop. For example, if your weekly shop comes to £68.65 and there is a 5% discount you would only pay £65.21. Saving you £3.43 on that week's shop.

Obviously, this doesn't apply if you pre-purchase your eGift, only if you wait until checkout to buy yours for the exact amount of your shop.