Will Self concludes his 600 mile road trip on the trail of much neglected Scottish physicist James Clerk Maxwell who 150 years ago pioneered the theory of the electromagnetic waves which made mobile phones, radio, radar and GPS possible.

In a bid to feel the wonder of Maxwell's work and legacy, Will is driving from Edinburgh to London in an electric car, accompanied by Akram Khan, professor of particle physics at Brunel University.

Will ends his journey in Cambridge posing the question: was Maxwell really a genius?

Producer: Laurence Grissell.