Wilkinsons have Original Source shave gels (NOT shower gels) at half price. Shelf price is £2.48 each, but cans have a small sticker stating "Half Marked Price". They scan at £1.24 each.
Our local Wilko (Beaumont Leys Leicester) had plenty of stock of the Mint & Tea Tree and Avocado Oil & Aloe Vera. Think this may be in-store only.