Martin Lewis is urging Tesco shoppers to follow his "golden rule" following a warning from the supermarket.
Anyone with a Tesco Clubcard has been warned by the retailer that £15 million-worth of Clubcard vouchers will expire after Wednesday, May 31 - making today the final day to spend them.
But the finance guru has shared some savings wisdom to both prolong the vouchers and also triple their value. According to Lewis, the coupons in question have a two year spending window from their first issue, meaning they can still be used after the final date.
