The whole gillette range (except replacement blades) is on half price offer. Gel and blade and razor packs. The razor and 2x blades costs £3.74 which even whilst not using the razor the blades alone costs just £1.87 per blade, normal price is £2.00 per blade.
Buy a bulk load with a voucher and you could seriously slash the cost of blades.
P.S. obviously not as good as the boots value pack deal on offer at the mo.