The untold story of the Pathfinders, one of the most secretive units in the British military.

For three decades one of the most secretive units in the British military has been a mystery force known as X Platoon.

Officially there was no X Platoon. The forty men in its elite number were specially selected from across the Armed Forces, at which point they simply ceased to exist. X Platoon had no budget, no weaponry, no vehicles and no kit - apart from what its men could beg, borrow or steal from other military units.

For the first time a highly decorated veteran of this specialised force - otherwise known as the Pathfinders - reveals its unique story. Steve Heaney became one of the youngest ever to pass Selection, the gruelling trial of elite forces, and was at the cutting edge of X Platoon operations - serving on anti-narcotics operations in the Central American jungles, on missions hunting war criminals in the Balkans, and being sent to spy on and wage war against the Russians.

The first non-officer in the unit's history to be award the Military Cross, Steve Heaney reveals the extraordinary work undertaken by this secret band of brothers.