This may be store specific but in my local Tesco (Telford) they have got loads of gift bags, tags, bows, and wrapping paper reduced.
For example a pack of tissue paper usually 99p was 25p
Gift Bags 25p
Bottle Gift Bags 25p
worth checking other stores to see if its a nationwide sale.
Great if like me you buy alot of these kind of things for kids party's.
Hope its of use to someone.