A five pound note, plus three one pound coins, makes eight pounds altogether. The space hopper cost £7.75p. £8.00 take away £7, leaves £1. And £1 take away 75p, leaves 25p change.

It's time to get shopping. Let's face it, us Brits have not behaved in a cool and calm manner to news that we're getting a new five pound note and the old paper five pound note will soon be going ...