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The UK in the 21st CenturyDeep Dive

Population Change: Growing, Ageing, and Diversifying

Part of A Changing UK · GCSE GCSE Geography revision

This deep dive covers Population Change: Growing, Ageing, and Diversifying within A Changing UK for GCSE Geography. Revise A Changing UK in The UK in the 21st Century for GCSE Geography with 15 exam-style questions and 20 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 2 of 15 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 15

Practice

15 questions

Recall

20 flashcards

📊 Population Change: Growing, Ageing, and Diversifying

The UK's population reached approximately 68 million in 2024, up from 50 million in 1950. This growth has not happened evenly or for simple reasons. It results from three interacting forces: natural increase, net migration, and changing life expectancy.

Natural Increase

For most of the 20th century, the UK's birth rate exceeded its death rate, producing natural population growth. However, the birth rate has been falling steadily. By 2022, the UK's total fertility rate was 1.49 children per woman — well below the replacement level of 2.1 needed to maintain population without migration. Women are having fewer children, and having them later in life, as education, career opportunities, and the cost of housing change life choices. Without immigration, the UK's population would eventually begin to decline.

Net Migration: The Major Driver of Recent Growth

In 2022, the UK recorded net migration of 745,000 people (ONS) — an all-time record. This is the difference between people arriving in the UK and people leaving. Migration brings workers, students, and families from countries across the world. It has significantly boosted the UK's working-age population, providing labour for the NHS (nurses and doctors from India, the Philippines, and Nigeria), hospitality, construction, and professional services.

Immigration is also one of the most contested political issues in the UK. The 2016 Brexit referendum result was driven significantly by concern about EU freedom of movement, which had enabled large-scale migration from Eastern Europe (particularly Poland and Romania) after 2004. Post-Brexit, the UK replaced EU freedom of movement with a points-based immigration system in January 2021 — yet net migration reached its highest-ever level the following year.

An Ageing Population

The UK has an ageing population: currently 18% of the population is aged 65 or over, and projections suggest this will reach 25% by 2045. This results from falling birth rates (fewer young people entering the population) combined with increasing life expectancy (people living longer through better healthcare, diet, and living conditions).

An ageing population has profound consequences:

  • NHS pressure — older people require more healthcare; demand for hospital beds, social care, and dementia services is rising steeply. The NHS already spends approximately £140 billion per year.
  • Pension costs — the state pension is funded by current workers through National Insurance; as the ratio of workers to pensioners falls, funding the pension bill becomes increasingly difficult. The UK already spends over £100 billion per year on state pensions.
  • Housing demand — smaller households (fewer children, more single elderly people) mean more homes are needed even without overall population growth. The government acknowledges a need for approximately 300,000 new homes per year, yet consistently delivers fewer.
  • Labour shortages — a shrinking working-age population creates skills gaps in healthcare, construction, and engineering; one reason immigration is economically important to the UK even when politically controversial.

    • Quick Check: Why is the UK's population growing despite a birth rate below replacement level (1.49 per woman)?

    Keep building this topic

    Read this section alongside the surrounding pages in A Changing UK. That gives you the full topic sequence instead of a single isolated revision point.

    The Country That Remade ItselfDeindustrialisation: How the North's Economy CollapsedThe North-South Divide: Evidence and the Self-Reinforcing MechanismUrban Regeneration: Salford Quays and MediaCityUK

    Practice Questions for A Changing UK

    Which of the following best describes why the UK's population is aging?

    • A. Birth rates are rising rapidly and people are having more children
    • B. People are living longer and birth rates have been declining
    • C. Young migrants are leaving the UK in large numbers
    • D. The NHS has reduced life expectancy through funding cuts
    1 markfoundation

    Define the term 'aging population' and give one consequence for the UK.

    2 marksstandard

    Quick Recall Flashcards

    What is a brownfield site?
    Previously developed land (e.g. a former factory or derelict industrial estate) that can be redeveloped — without using up open countryside.
    What is the green belt?
    Designated land around major UK cities where most development is prohibited, to prevent urban sprawl and preserve countryside.

    15 questions on A Changing UK — practise free

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    The Country That Remade Itself

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    Deindustrialisation: How the North's Economy Collapsed