Money Saving Expert founder Martin Lewis has issued an urgent warning to anyone with a Tesco Clubcard.

According to a post on Lewis’ website, an eye-watering £18 million worth of Clubcard vouchers are set to expire at the end of November.

In the post, he warns that Clubcard vouchers are only valid for two years from the date they were issued, meaning that if you don’t use them, you lose them.

Lewis warns that shoppers should check the date on the vouchers themselves or if they are lost, to…