One for Lloyds bank customers:
Earn 10% cashback (up to £10) @ Morrisons when you pay with Lloyds debit/credit card (check your offer) if you are offered the deal & opt in via internet banking (one click).
Morrisons/Lloyds have run this before but it is currently live for me until 3rd August 2014, so is likely be working for others. Great when combined with all the other offers running atm.
Excludes petrol & morrisonscellar.com.
It is called "Lloyds Every Day Offers" and features other retailers too, but varies depending on your current spending habits.