Tesco unlocks trolleys as the new pound coin is incompatible with current locks

Supermarket Tesco has made a bold decision following the introduction of the new 12-sided pound coin - it is to unlock its trolleys in around 200 stores until it can fit locks capable of handling the coins.
There's a wider story at play, the pound, which comes into circulation on Tuesday 28 March, is incompatible with a lot of machinery designed for the round pound coin.
This could conceivably create widespread problems for the likes of vending machines, parking meters and more automated machine