Encircling London like a noose, the M25 is a road to nowhere, but when Iain Sinclair sets out to walk this asphalt loop

keeping within the ‘acoustic footprints’

he is determined to find out where the journey will lead him. Stumbling upon converted asylums, industrial and retail parks, ring-fenced government institutions and lost villages, Sinclair discovers a Britain of the fringes, a landscape consumed by developer, London Orbital charts this extraordinary trek and round trip of the soul, revealing the country as you’ve never seen it before.