Why do sausage rolls and veterinary fees vary in price across London?

Cinnamon the rabbit needs to hop across London for cheaper vet fees

Have you ever wondered why the same item costs more or less depending on where in London you buy it?

Take a bog standard Greggs’ sausage roll for example. If you buy it in an outer London borough like Sutton, it costs £1.35. But if you buy it in central London you're likely to pay £1.60.

You might have guessed that the price difference, according to Greggs, is often about location.

"We use national pricing across most of our shops however, this can vary in certain locations where costs are higher than average, such as travel hubs," they told the BBC in a statement.