Wandering around the Greenham Business Park in Thatcham recently, I spotted several of these prefabricated huts dotted around between the more modern buildings. My guess is that the site used to be an airfield, possibly from WW2. The giveaway being the hanger-like buildings also present.
The huts appear to be longer than most, but the prefabs could be built any size you like thanks to the modular design. I'm pretty sure no-one expected them to last this long!
If the buildings don't interest you, perhaps one of the occupiers would - The National Needlework Archive. Who knew such a thing existed?