The Gatehouse at Bonds Mill

The Gatehouse at Bonds Mill at Stonehouse, Gloucestershire, England, was constructed during World War II as a defensive pillbox as part of the Stop Line Green. It is a rare example of a two-storey pillbox with a rooftop gun emplacement and is a Grade II listed building.[1] It is now used a visitor centre run by the Cotswold Canals Trust.[2]

The pillbox and bridge

It was built in 1940, as one of sixteen pillboxes alongside the Stroudwater Navigation, a canal that links Stroud to the Severn Estuary. It has an octagonal floorplan based on the Type 24 pillbox, the ground floor being constructed of reinforced concrete and the upper storey is red brick. It is situated on the north side of the canal, across from the former Bond's Mill, which was being used during the war by Sperry as a dispersal factory to manufacture gyroscopic compasses. After the war it was adapted for use as a gatehouse for the mill and later to include hydraulic controls for the bridge that crosses the canal. In 1994 the original bridge was replaced with the world's first composite plastic lift bridge for vehicular traffic.[1][3][4]