Walham

Walham is a hamlet in Longford parish, north of Gloucester, England. It lies on the banks of the River Severn and north of the A40 road. It is a suburb of Gloucester, which is to its south.

A National Grid substation, providing power to half a million homes and the Government Communications Headquarters (GCHQ), is situated at Walham. The substation came to national prominence in July 2007, when it was threatened by a major flood. The fire service and military stopped the flood waters two inches below the height at which the plant would flood. This struggle with nature was dubbed the "Battle for Walham" in national newspapers.