the headquarters of Brandon Lifting at 7 Worthy Road. There is also the shell of a despatch shed, and the stub of a railway line that once entered the works complex. The original internal railway system of the smelting works (separate from the filling factory) was operated by two-foot gauge four-wheel battery-driven locomotives built for the Ministry of Munitions by the forerunner of Brush Traction of Loughborough. Two of them, maker's numbers 16302 and 16307, still exist. At the end of the war three, including these two, were acquired by the General Estates Company Ltd as surplus to wartime requirements and then sold in 1922 to the Hythe Pier Railway in Hampshire, where they were converted from battery-driven operation to a third-rail electric system operating at 250 volts. Since the First World War The present industrial estate (or "trading estate") developed mainly after World War II, under the management of the Port of Bristol Authority. In 1951 a factory producing carbon black was built to the north-east of the estate (Philblack, later Sevalco), and operated until 2008 when its closure was announced. The site has since been cleared with the exception of three storage tanks. Internal structure of the trading estate The estate is now organised around a structure of named roads: the spine, Worthy Road, and the peripheral Greensplott Road and Bank Road, all named after farms whose land disappeared under the industrial development. Current businesses A selection of the current businesses operating from the site can be viewed online. They include specialists in transport and logistics, plant and vehicle hire, lifting gear, pallet distribution, sectional buildings, industrial cleaning, damp control and vehicle repairs. Rail links Between 1917 and 1964, the Chittening site was served by Chittening Platform railway station on the Henbury Loop connecting Avonmouth with Filton Junction. It is now served by St Andrews Road railway station in Avonmouth Docks, a mile and a half or so to the south. The closure of the earlier platform was immortalised in the song "Slow Train" on an album released in 1964 by Flanders and Swann. Chittening Warth Chittening Warth is an area of salt marsh beside the Severn Estuary, just beyond the sea-bank to the west of the industrial estate; warth is a local word for land periodically overflowed by the tide. At low tide the mudflats there are visited by large numbers of birds, including dunlin, Eurasian curlew,