Morrisons customers have been unable to get discounts on their shopping ahead of Christmas after a problem with the More loyalty card.

The supermarket has been advertising heavy discounts on Christmas dinner food, including vegetables, in the last week.

But social media users say their discounts are not working at the till, with one person posting a photo of an error message at the self-checkout, which reads: "We are really sorry some promotions and discounts are not working at this time."

The Morrisons website also appears to be down, with a "502 bad gateway" error message on some pages.

Morrisons has been contacted for comment.