Boots are currently offering 15% off Clinique products, the code gives an additional £5 off selected facial cleansers (I have highlighted the cheapest one). If you buy more than one £5 will be deducted for each.
Student Discount also stacks with the above for an additional 10% off. Also worth checking your advantage card offers as I was awarded 600 bonus points for buying 3 (200 points per selected Clinique product).
I checked the code not logged into my account to check it was not account specific.