Swindon is a large town within the borough of Swindon and ceremonial county of Wiltshire, in South West England. It is midway between Bristol, 40 miles (64 km) west and Reading, 40 miles (64 km) east. London is 81 miles (130 km) east. In the 2001 census, the population of the Swindon urban area was 155,432, while the wider borough of Swindon had a population of 184,000. Swindon was named an Expanded Town under the Town Development Act 1952 and this led to a major increase in its population. Swindon railway station is on the line from London Paddington to Bristol. Swindon Borough Council, is a unitary authority independent of Wiltshire Council since 1997. Residents of Swindon are known as Swindonians. Swindon is home to the Bodleian Library's book depository, which contains 153 miles (246 km) of bookshelves.