Being underground, this place was awkward to say the least to get into. But with help of a traffic cone perched on top of a discarded fridge we managed to get inside!

Some history:

Firth Brown Steels was  founded in 1902, when Sheffield steelmakers John Brown and Company exchanged shares and came to a working agreement with neighbouring company Thomas Firth & Sons. In 1908 the two companies came together and established the Brown Firth Research Laboratories and it was here, in 1912, under the leadership of Harry Brearley they developed high chrome stainless steel. The companies continued under their own management until they formally merged in 1930 becoming Firth Brown Steels. The company was amalgamated into Sheffield Forgemasters in 1982.

This former medical centre would have been used to treat injured workers and although not quite 'underground' it is now buried underneath a car park. 

And today it still exists albeit underground and hidden from the world. Dark and decaying inside, it still had great photographic appeal. Exposures were long trying to gather light for the D800 sensor to capture the archaic surroundings.

I may have damaged my ribs but it was worth it, a fascinating little place to explore with David and Katy.