At my local Tesco Homeplus (North Bristol), they've got these at 83p each! Misprice or select stores only perhaps, but a great deal where it's available! It wasn't a special clearance, as it was just on the shelf with the other men's skincare products.
Boots sell it for £4.88 here: http://www.boots.com/en/Gillette-Series-After-the-Shave-Gel-Sensitive-100ml_857891/
They also have Gillette Fusion series lotions and gels for £1 to £2, on yellow-tag markdowns (limited time but I didn't notice the dates) down from £4-6ish regular price.