Sainsbury is launching a credit card in a joint effort with American Express.

The Amex-Nectar card will be launched in September and is designed to be the most lucrative award scheme available.

Customers who use the card will earn four points with every £1 they spend.

However, the deal with American Express means that Barclaycard’s association with Nectar will end.

Barclaycard will stop awarding Nectar points from the end of August and withdraw from the scheme.