The filmmaker is getting worried. A film about swifts and he hasn’t even seen one yet - only house martin swift-impersonators.

He needn’t have worried. Chris introduces him to a physicist who has lived with them all his life in a place where time stands still.

Julian Barbour shares swift stories - along with a whiteboard of maths, proving there’s no such thing as time (this, a mere aside.)

Suddenly swifts are everywhere. They are indeed incredible creatures.

The filmmaker travels to South Newington in the beautiful Austin Healey: