A study at Bath's Mineral Hospital has confirmed patients are managing to improve their symptoms with the therapy.

The research team speculated CPRS could be due to the brain processing pain messages in the wrong way.

By looking at the mirror image of Martin's good leg, he may be able to trick his brain into changing the messages sent to his bad leg, and so improve the function of his nerves.

The technique was first used at the Bath Mineral Hospital in the late 1990s to treat phantom limb pain for patients with amputated limbs.