To cash in on the extra points, shoppers can make their purchases count by scanning their Nectar app at the checkout or when using SmartShop. If they are shopping online they can link their Nectar ...

Martin Lewis' Money Saving Expert has warned Sainsbury's has added a new 'Spend Lock' feature to its Nectar loyalty app that prevents your points from being redeemed without your knowledge.

The supermarket chain is introducing a new “spend lock” feature on its Nectar app which will allow shoppers to freeze their accounts and set exactly where their points can be redeemed.