Superdrug - 10% off for filling in survey -Purchase required

For a while now, when you buy something there is an option of filling in an online survey, you then put the code onto the reciept which entitles you to 10% off another purchace (min £10).

Works out really well with the mens loreal and shaving things which are on offer at the moment as it works out to be a furter 10% off the already discouted items.