Fat chance

Are they off their trolleys? A prototype shopping cart has been found in a London branch of Tesco which has been deliberately modified so as to be difficult to push. No, it's not a vindictive device to sabotage Supermarket Sweep contestants; it's a new way of enabling people to get their groceries and burn up a few calories at the same time. Maybe working out in the supermarket will catch on, in which case good luck to Tesco.

Are they off their trolleys? A prototype shopping cart has been found in a London branch of Tesco which has been deliberately modified so as to be difficult to push. No, it's not a vindictive device to sabotage Supermarket Sweep contestants; it's a new way of enabling people to get their groceries and burn up a few calories at the same time. Maybe working out in the supermarket will catch on, in which case good luck to Tesco.

The only thing that baffles us - and anyone who has struggled with one of those truculent metal beasts will surely agree - is why the modified trollies? Doesn't the existing fleet perform this particular job just as well?