Portishead has a long history as a fishing port. It expanded rapidly during the early 19th century around the docks, with supporting transport infrastructure. A power station and chemical works were added in the 20th century, but the dock and industrial facilities have since declined, redeveloped into a marina and residential areas. Portishead was also the telephone control centre used by British Telecom (BT) for non-direct dialled calls to maritime vessels, a service known as Portishead Radio.