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UK Set to Become Europe’s Most Populous Country by 2100

Experts warn rapid migrant arrivals to offset low birth rates risk straining housing, health services, welfare budgets, green spaces, food security without a government population plan.

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Overview

  • United Nations World Population Prospects 2024 forecasts the UK population will exceed 86 million by 2100, overtaking all other European nations.
  • Projected cumulative net migration of 14.3 million is expected to drive 6.8% growth as the total fertility rate remains at 1.44 children per woman.
  • A cross-party report led by Lords Hodgson and Glasman criticizes political inaction and calls for an independent Office for Demographic Change.
  • Seventy percent of Britons believe the government lacks any strategy for managing long-term population growth and migration, according to recent polling.
  • Foreign nationals on Universal Credit rose from about 906,000 in June 2022 to 1.26 million in June 2025, underscoring mounting welfare budget pressures.