Sign up to Sainsbury's via Quidco.
You will get £10 credit from Quidco. Four of these ten pounds can be used on your shopping while the remainder £6 is used for delivery charges!
So technically, almost anything you want with either £4 off OR anything under £4 for FREE! ...delivered at a time that suits you!!
+ you can also earn nectar points!
Quidco terms: For a new customer registration and purchase via the grocery section of the site. A new customer is defined as someone who has not purchased groceries online within the last six months.