Southall, United Kingdom

The southernmost part of Southall is known as Norwood Green. It has few industries and is mainly a residential area, having remained for many years mainly agricultural whilst the rest of Southall developed industrially. Norwood Green borders, and part is inside, the London Borough of Hounslow.

The main east west road through the town is Uxbridge Road (A4020), though the name changes in the main shopping area to The Broadway and for an even shorter section to High Street. Uxbridge Road was part of the main London to Oxford stagecoach route for many years and remained the main route to Oxford until the building of the Western Avenue highway to the north of Southall in the first half of the 20th century. First horse drawn, then electric trams (until 1936) and, then, electric trolleybuses, gave Southall residents and workers quick and convenient transport along Uxbridge Road in the first half of the 20th century before they were replaced by standard diesel-engined buses in 1960.

The opening of the Grand Junction Canal (later renamed Grand Union Canal) as the major freight transport route between London and Birmingham in 1796 began a commercial boom, intensified by the arrival of Brunel's Great Western Railway in 1839, leading to the establishment and growth of brick factories, flour mills and chemical plants which formed the town's commercial base. In 1877, the Martin Brothers set up a ceramics factory in an old soap works next to the canal and until 1923, produced distinctive ceramics now known and collected as Martinware.

A branch railway line from Southall railway station to the Brentford Dock on the Thames was also built by Isambard Kingdom Brunel in 1856. It features one of his (impressive for the period) engineering works, the Three Bridges (although it is still often referred to on maps by the original canal crossing name of Windmill Bridge). where Windmill Lane, the railway and the Grand Union Canal all intersect – the canal being carried over the railway line cutting below in a cast-iron trough and a new cast-iron road-bridge going over both. Brunel died shortly after its completion. Sections of his bell-section rail can still be seen on the southern side being used as both fencing posts and a rope rail directly under the road bridge itself. It is listed as a Scheduled Ancient Monument. The other notable local construction by Brunel is the Wharncliffe Viaduct which carries the Great Western Railway across the River Brent towards London and which was Brunel's first major structural design.

Otto Monsted, a Danish margarine manufacturer, built a large factory at Southall in 1894. The factory was called the Maypole Dairy, and eventually grew to become one of the largest margarine manufacturing plants in the world, occupying a 28 ha (69 acres) site at its peak. The factory also had its own railway sidings and branch canal. The Maypole Dairy Company site was later acquired by Lever Brothers who, as part of the multinational Unilever company, converted the site to a Wall's Sausages factory which produced sausages and other meat products through until the late 1980s.

At the beginning of the twentieth century, the old parish church of Southall, St John's, which had been rebuilt in 1837–8, was found to be too small for its congregation and, as a result, emigrated to a new building in Church Avenue, which was completed in 1910. The original church building, in Western Road, is now a youth centre.

In the 1920s and 1930s Southall was the destination of many Welsh people escaping from the harsh economic conditions in that part of the country. For many years, Welsh accents were very commonplace in the area.

On the eastern boundary of Southall was the Hanwell Asylum, which was once the world's largest asylum for the mentally ill. It was considered in its day to be a progressive institution with a good success rate for treatment. As attitudes to and treatment for mental illness improved, the site was renamed St. Bernard's Hospital. In the late 1970s, the site was extensively redeveloped, with most of the area now taken up by the Ealing Hospital. St. Bernard's still operates a large facility on part of the site under the West London Mental Health (NHS) Trust.