Tesco vouchers expire today. What can I do?

[unlikelychump]

How do I convert them into cash other than going into a shop and spending money?

Would they work for an online shop? Or to convert into something else?

You can double them up by buying vouchers for a Clubcard partner. Would that work?

Yes convert to a reward partner eg chessington, Disney plus etc and you then have more time to use them.

I use my Clubcard vouchers to pay for Disney +

You can use for an online shop to be delivered when you can get a slot.

New phone/contract from Tesco mobile? Or as PP have said use them for vouchers with partners.