Geograph - photograph every grid square

When The Oval was converted from a market garden into a cricket ground in 1845, its neighbour was a waterworks with an engine house and two circular brick-lined reservoirs.

That same year, the Phoenix Gas Light & Coke Company purchased it from the Southwark & Vauxhall Waterworks Company and set about erecting five gasholders between 1847 and 1874. The biggest one, looming over everything else at a height of 135 feet, was known as Gasholder Number One and is the only one to survive.

Decommissioning was completed in 2014 and at the time of writing, it is being transformed into the Oval Village housing development by Berkeley Homes.