Many countries have difficulty recruiting teachers to schools away from the largest population centres, but Scotland came up with what looked like a clever solution: pay new teachers thousands of pounds on top of their salary, if they agree to be sent anywhere the country.

The so-called preference waiver scheme has been around for nearly 20 years now, but what is it like being sent somewhere you might struggle to find on a map? Does it boost or blight careers? And does the scheme actually work?