Asda has warned Facebook users against a scam that claims to give respondents a "£500 Asda Christmas voucher".

Users clicking on the link are asked to share the fraudulent page and then take an online survey, which captures their data including their phone number. Although the page has been branded to look like the Asda website, the ‘giveaway’ is nothing to do with the supermarket.

In a post on its Facebook page, the supermarket warned: “Do not respond to Facebook posts and ads doing the rounds just now inviting you to "claim a £500 Asda Christmas voucher". These are nothing to do with us and may be an attempt to capture your personal information. Please share this to make sure your friends are not taken in. Thank you.”