The website Cornerstone offers shaving products for men, as part of a subscription. Quidco are currently offering £11 cashback for new subscriptions. Click through Quidco, then, after accessing Cornerstone via a £10 off first orders link (can be found on many websites) via another browser, copy and paste that link to the same browser where you opened the website from Quidco.
Add any products, so that the overall sum will be at least £11.
Options: Pre-shave face scrub (£5)
Shave gel (£6)
Shave cream (£6)
Post shave balm (£5)
Razor blades (£14)
£10 will be deducted, you will have to pay only £1 (delivery is free), and £11 from Quidco will most likely track for you (it did for me).
Once you receive the products, you can easily cancel the subscription online.