Okay, bear with me on this one, because it could be a long shot!
From the Advantage Card machine in Boots today, I got a voucher which said "Any 2 Botanics for Men products for £5. Excludes Gift Sets." So I went to look, and they had plenty of products which by themselves were over £5.
I picked up the "Intense Recovery Cream" at £8.75 and "Look Alert Under Eye Serum" at £6.75. Total = £15.50 Lo and behold, the voucher worked at the till, so I got both for a total of £5 - a saving of £10.50, so less than a third of the price they should have been.
Now, it guess it depends whether you get this voucher when you check the machine - they tailor them, so you may even only get it if you're a bloke. But it's worth having a look. The most you could save is by buying two of the £8.75 moisturisers, which would save you £12.00.