Instructions:Picked up a leaflet in store today for £10 off £50 online grocery shop at Tesco.
This is for first order only so if you have already ordered from them online it will not be accepted.
You could try setting up a new account with a different email address but I don't know if that will work or not.
Enter code XXSTORE in the voucher section before checking out to receive your discount
Also just discovered that Topcashback are paying £10 cashback for registering and doing first shop online at Tesco. so possible £20 saving..