United Kingdom United Kingdom The United Kingdom, another member of the EU, also has a plan of reducing the size of the armed forces by 20% between 2010 and 2018, and apply smaller cuts to the Royal Navy and RAF. The defence budget of the UK currently stands at $54 billion. It has a regular force of only about 205,000, along with a small air force of 908 aircraft, and an even smaller navy of 66 ships.