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Reservists are people of all ages who train with the Royal Navy, Royal Marines, British Army or Royal Air Force alongside their day-to-day jobs.
They play a critical role in national defence and security, from supporting communities and national resilience at home, to countering threats, peacekeeping and humanitarian work abroad.
There are currently around 30,000 Reservists in the UK, forming approximately 20% of the nation’s Armed Forces, and recruitment is ongoing. In the 2025 Strategic Defence Review, the Government outlined plans to increase the country’s active Reserve Forces by at least 20% when funding allows.
Dubbed “twice the citizen” by Winston Churchill, they can be called upon as individuals for their specific skills or as ready-formed units to serve alongside Regular Forces when required.