Seen this on quidcos opening page you get 8% cashback plus 10% off ! This might not be the best laptop to go for but just an example of how it can be used if you are after a HP.
Starts at £649 with 10% off = £584.10
Then Quidco gives you 8% of £584.10 to bring it down further to £537.37ish
When applied to this laptop u are getting over £100 off... this can be used on any laptop of course.
******Spec will be in the direct link.*******