Have you ever seen a face in a crowd and thought to yourself,  I know that person?

It's a skill possessed by only one or two percent of the population.

But it has real uses, and police are being urged to use super recognisers and make this talent a recognised part of forensic intelligence.

Mike Neville is with the UK's Association of super-recognisers. He helped to set up a unit within Scotland yard, and is now consulting all over the world.

He joins Tim Dower to explain how it all works.

LISTEN ABOVE