Martin Lewis issues urgent Tesco two-week warning to all shoppers

Martin Lewis has hit Tesco shoppers with an urgent warning ahead of some key money-saving dates in the calendar.

The finance expert is back at it again, and this time it's not to do with anything complicated like bills or deposit-free mortgages - instead Lewis' advice is about something we can all understand: the food shop.

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Whether you're a yellow-sticker bargain hunter or a 2-for-1 fiend, saving money on the food shop is always satisfying.

Most big supermarkets have rewards systems in place to help customers save money, and in Tesco that comes in the form of the Clubcard.

Pennies spent in the store turn into Clubcard points, which customers can then turn into vouchers to spend on even more food or save them up for some bigger treats, like days out.

It might be time to take another look at your Clubcard balance, though, because Lewis has warned that the clock is ticking on existing points.

Speaking on Good Morning Britain this week, Lewis dropped the bombshell that a whopping £15 million worth of Clubcard vouchers will expire at the end of the month.

It comes as Tesco also prepares to reduce its Clubcard Reward perk from 3x to 2x.

The Money Saving Expert urged customers to have a look for any existing vouchers online, and in true Lewis fashion even came up with a crafty tip to ensure shoppers can make the most out of them.

"You go online, spend 50p on a restaurant voucher of your £10. So you now have got £1.50 of your restaurant voucher because 50p becomes £1.50," he said.

"For the rest of the £9.50 they re-issue and it lasts another two years. So if you spend just a little bit of a voucher the rest of it is reissued and it last another two years. But otherwise the older vouchers become invalid on May 31."

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The official Tesco website has issued a statement to customers noting that 'time's running out to get 3x more value with our Reward Partners'.

The site continues: "From 14 June, you can exchange your Tesco Clubcard vouchers for 2x their value. To give you more time to use your codes, we've extended the validity period for all codes ordered until 13 June, from 6 months to 12 months."

Tesco said it's making the change to 'make sure [it] can continue to provide a wide range of rewards that meet the needs' of Clubcard members.

"Tesco Clubcard continues to have the biggest and most generous Reward Partner scheme with access to over 100 Partners at 2x your Clubcard voucher value," the supermarket added.