Customers at Asda found an online payment loophole which allowed them to get £50 off their shopping if they spent over £50.

An Asda spokesman said: “We're aware of a glitch with our e vouchering, and are in the process of addressing it. No-one has lost out as a result of it, but a small number of savvy customers have taken advantage and got more money off than they should have.

“We’ve removed the glitch which has prevented customers from using the rogue voucher and we apologise for any confusion caused. We will not be honouring any outstanding orders which have used a rogue voucher code.”