The humble supermarket trolley could be about to get one of its biggest makeovers in decades. Forget rummaging for a €1 coin, unloading your groceries onto a conveyor belt or standing in long checkout queues.

The humble supermarket trolley could be about to get one of its biggest makeovers in decades. Forget rummaging for a €1 coin, unloading your groceries onto a conveyor belt or standing in long checkout queues.