CLASP (British Rail)

The former Southern Region of British Rail, the state-owned railway operator, adopted the system in the 1960s and 1970s and used it for signalboxes and station buildings.

By the 1960s, the need for immediate action became so great that the Region's management had to abandon traditional individual rebuilding projects in favour of a mass-produced solution using factory-made parts.

The prefabricated buildings were made of steel and concrete, and had several distinctive characteristics: a steel-framed, flat-roofed "box", usually one storey high (although some two-storey versions were produced),[3] with a large water tank mounted on the roof.

British Rail used it twice on the Southern Region, when Newington and Teynham stations were rebuilt in the late 1970s to suit one-man operation.

[2] From 1980 and throughout the next ten years and into the 1990s, British Rail adopted a new system of brick buildings with apex roofs, smaller examples resembling a 'chalet'.