Customers can bring wardrobe clutter from any brand into all of the H&M UK stores and in return, they will be given a £5 voucher for each bag of shouldn't-have-bought-that. Kerching(-ish)!
The discount can then be used with purchases that amount to £30 or more. Tidy.
Whilst we're on the shopping front, we know you bright young things will like these style staples for 2013: