Britain’s mysterious underground tunnels have been a source of fascination for decades. Yet, until recently, authorities have remained conspicuously secretive about them.
While the UK is one of the most heavily mapped countries in the world, with the Ordnance Survey – the national mapping agency for Great Britain – having scoured every inch of the country’s land above ground, underneath, it still remains much of a mystery. For the first time, however, the agency is attempting to create a detailed picture of the UK’s subterranean landscape by mapping its underground assets.