Urban expansion in the age of industry
Across the period in which criminals were transported to Australia, cities in Britain expanded rapidly. 'Push and pull factors' meant that people left the countryside and migrated to towns. Enclosure of open and common fields made it more difficult for the poorest to make a living in the countryside, and employment opportunities in new factories provided an incentive to move to urban areas. In 1801 already one third of the population of England and Wales lived in urban areas, and by 1851 about half of the 16.9 million inhabitants of Britain lived in a town or city [1].
With its position on the Humber estuary, facing eastwards to the North Sea and Europe beyond, Hull had long been an important port, and during the late 18th and early 19th centuries the port prospered, serving the expanding industries of the West Riding of Yorkshire and the increasingly productive agricultural hinterland of the East Riding of Yorkshire. In 1778, a new dock was opened to ease congestion in the old harbor in the River Hull, and in the early 19th century two more docks were added. With the population expanding from 21,000 in 1801 to 57,000 in 1851, and an increasingly wealthy merchant class looking for more spacious and stylish accommodation, the urban area of Hull pushed out beyond its medieval defensive limits.
References cited: [1] Edward Royle, Modern Britain. A Social History 1750-1985 (London: Edward Arnold, 1987) p.21.