UK Population Distribution and City Case Study

An unevenly populated UK

Population distribution describes where people live; population density describes how closely packed they are. A densely populated area has many people per square kilometre, while a sparsely populated area has few. These ideas are connected, but an average density for the whole UK hides large differences between places.

The UK’s population is concentrated in urban areas, particularly in England. South-east England, including London, is densely populated. Other major concentrations include the Midlands around Birmingham, north-west England around Manchester and Liverpool, and Yorkshire around Leeds and Sheffield. Newcastle is another important urban centre in north-east England.

In Scotland, much of the population is concentrated in the central belt around Glasgow and Edinburgh, whereas northern Scotland is sparsely populated. In Wales, the south around Cardiff, Newport and Swansea is more densely populated than much of the interior. Northern Ireland has a major population concentration around Belfast. The pattern is therefore not simply ‘the south is crowded and the north is empty’: northern England and central Scotland also contain large cities.

Why cities developed in these places

Many UK cities grew in relatively flat, low-lying areas, often near major rivers or on the coast. Flat land made building and transport easier. Rivers and coastal sites provided routes for trade, while surrounding farmland helped supply food. Later, industry attracted workers and encouraged settlements to expand.

This helps explain the close connection between city locations and high population density. Large numbers of people live close to jobs, services and transport links, and neighbouring settlements may grow together into extensive urban areas.

The pattern can change as the economy changes. Between 2004 and 2013, London and several cities in south-east England experienced strong population growth. In contrast, Sunderland experienced decline as shipbuilding and coal mining jobs disappeared, encouraging people to move elsewhere for work. These are dated examples of how employment can influence population change, not fixed rules about every city’s future.

London’s location and early growth

London is in south-east England, on the River Thames. Its riverside position helped it develop into a major city. The Romans established Londinium on the north bank of the Thames following their conquest of southern England in AD 43.

The Thames offered access for ships: its tidal waters allowed vessels to travel upriver to London. London also developed at an important bridging point, where a bridge could connect land on either side of the river. Together, these advantages made it a place where river trade and land routes met.

From the eighteenth century, new docks increased London’s capacity as a port. Trade and manufacturing created employment, which attracted people and supported population growth. Although its port role later declined as shipping shifted towards coastal docks, London retained powerful transport and economic connections.

Why London matters nationally and internationally

Within the UK, London is the capital and largest city. It is a centre of government and a major focus of the road and rail networks. It also contains the headquarters of many major British businesses. These functions connect decisions and activities in London with people and places throughout the country.

London’s economic importance is illustrated by the 2015 comparison: average earnings were £34,473 in London against £22,044 across the UK. Average house prices were also much higher: £514,000 compared with £272,000. These averages show London’s concentration of wealth and expensive property; they do not mean that every London resident is wealthy.

Internationally, London is a world city. Its financial services connect businesses and investment across countries, and many multinational companies have headquarters there. Heathrow and Gatwick provide major international air connections, supporting business travel and tourism. Overseas investment in developments such as the Shard and the Olympic Village also demonstrates London’s links with the wider world.

These roles help explain why London attracts migrants. People move there for employment across a wide range of incomes, from finance to hospitality and other services.

Migration and London’s population growth

National migration means moving within the UK; international migration means crossing a national border to live elsewhere. Both have contributed to London’s growth.

During the nineteenth-century Industrial Revolution, London attracted migrants mainly from other parts of the UK. Its population rose as people moved towards employment. Growth has not been continuous: wartime bombing, subsequent housing demolition and movement out of London contributed to decline after its pre-war peak in 1939. Population growth resumed from 1991, and London reached 8.6 million people in 2015.

To understand growth, count both people arriving and people leaving. The difference is net migration. Many arrivals do not necessarily produce a large net gain if many other people leave during the same period.

$$\text{Population change} = (\text{births} - \text{deaths}) + (\text{arrivals} - \text{departures})$$

Migration also changes population structure. London attracts young adults, particularly people in their twenties and thirties seeking work, higher pay and a lively social environment. The mid-2010s case study describes arrivals as generally younger than those leaving. This helps produce a younger population than the UK overall.

A larger population of young adults can also increase the number of births. When births exceed deaths, natural increase occurs. Migration can therefore affect growth both directly, by adding residents, and indirectly, by changing the age structure and contributing to later natural increase.

Growth increases demand for housing, schools, healthcare and transport. Migrants also contribute workers, skills and businesses, including in healthcare, construction, hospitality and finance. The effect is not only more people: the city’s workforce and needs change too.

Migration and London’s character

A city’s character includes its communities, languages, religious buildings, shops and services. International migration has helped make London culturally diverse. The mid-2010s case study records that 37% of residents were born outside the UK. This measures birthplace, not ethnicity.

London has long attracted people from overseas. Migrants from countries such as India, Nigeria and Jamaica reflect historical connections with the British Empire. During the 2000s, EU enlargement and freedom of movement also supported migration from Eastern Europe, including Poland and Romania. This explains a historical migration pattern rather than describing today’s migration rules.

Spitalfields, in east London, provides a concrete example of changing character. French Huguenot Protestant refugees settled there in the seventeenth century. Jewish refugees from Eastern Europe arrived in the nineteenth century, followed more recently by economic migrants from Bangladesh.

The building now known as Brick Lane Mosque reflects this succession of communities. It was originally a Huguenot church, later became a Jewish synagogue and subsequently became a mosque used by the Bangladeshi community. Its changing use shows how migration can reshape the cultural and religious life of an area while an existing building remains.

London’s growth and character are therefore linked: migration changes the number and ages of residents, supplies labour and helps create distinctive communities and services.

UK population pattern

• Uneven distribution: major cities and surrounding urban areas are densely populated.
• Concentrations: south-east England; Midlands; north-west England; Yorkshire; Scotland’s central belt; south Wales; Belfast.
• Northern Scotland and much of upland Wales are sparsely populated.
• Many cities developed on flat land, near rivers or coasts, supported by trade and industry.

London: location and importance

• Location: south-east England, River Thames.
• Early advantages: tidal access for ships and an important bridging point; later docks, trade and manufacturing.
• National: UK capital, largest city, government, company headquarters, road and rail hub.
• International: world financial centre, multinational headquarters, overseas investment, tourism and major airports.

Migration and growth

• National: nineteenth-century arrivals from elsewhere in the UK supported industrial growth.
• International: employment attracts people from across the world.
• Age structure: young adult arrivals help create a younger population and can increase births.

$$\text{Population change} = (\text{births} - \text{deaths}) + (\text{arrivals} - \text{departures})$$