Bristol is a city, unitary authority area and ceremonial county in South West England, with an estimated population of 433,100 for the unitary authority in 2009, and a surrounding Larger Urban Zone (LUZ) with an estimated 1,006,600 residents, it is England's sixth, and the United Kingdom's eighth most populous city, one of the group of English Core Cities and the most populous city in South West England.
Bristol is the largest centre of culture, employment and education in the region. Its prosperity has been linked with the sea since its earliest days. The commercial Port of Bristol was originally in the city centre before being moved to the Severn Estuary at Avonmouth; Royal Portbury Dock is on the western edge of the city boundary. In more recent years the economy has depended on the creative media, electronics and aerospace industries, and the city centre docks have been regenerated as a centre of heritage and culture.