The size and structure of the British Army is continually evolving, but as of 1 July 2012, the British Army employs; 107,340 full-time soldiers (103,590 Regulars, 3,750 Gurkhas) and 31,600 Territorial soldiers for a combined component strength of 138,500 soldiers. In addition there are 121,800 Regular Reserves of the British Army
Now Great Britain is hot for the Army 2020 thing and sizes down like this here:
The best-manned and most extensively trained element of the redesigned army will be a ‘Reaction Force’ comprising a division made up of three armoured infantry brigades, a mixture of tanks and armoured infantry. Held at high readiness for overseas interventions, these will undertake 'hard fighting' against both conventional and hybrid opponents, as well as the toughest peace-enforcement missions. The Reaction Force will include 16 Air Assault Brigade, which will retain a unique mixture of parachute battalions and Apache attack helicopters, although its ground element is set to get smaller, as will the army's contribution to the Royal Navy's amphibious force, 3 Commando Brigade. Either brigade could be joined by armoured infantry brigades to make up a division-sized war-fighting formation.
The second element will be an ‘Adaptable Force’, a division made up of seven infantry brigades of regular and reserve light cavalry regiments and infantry battalions ‘easily capable of adapting to a wide range of tasks'.
Three brigades are designed to combine together to form up to two light all-arms brigades for an enduring stabilisation operation. Four smaller infantry brigades will be held at a lower state of readiness. New thinking suggests that the Adaptable Force could be used as a primary tool for UK military assistance and training to other countries. Its units are likely to be aligned to particular regions of the world, such as the Middle East, Africa and Southeast Asia, to establish closer links and develop broader understanding and language skills. The adaptable force will also be the primary source of support to the UK civil authorities.
The third element of the Army 2020 vision is a division of 'Force Troops', containing artillery, signals, engineer and medical brigades that will support the Reaction and Adaptable forces. Close support communications, engineers and artillery were previously part of the armoured and mechanised brigades. But, driven by the need to partner both regular and reserve units, and to make the most cost-effective use of equipment, the majority of support units are to be centralised in specialist brigades. Previously disparate surveillance, drone and intelligence units will be grouped into a single new intelligence and surveillance brigade. Signals units will be redesigned to deliver network and broadband access to battlefield units in new ways through deployed 'points of presence'. The army's hard-won expertise in countering improvised explosive devices is to be merged into a single group of engineer search teams, bomb-disposal operators and search dogs.
Pic - " British Army is actively engaged in operational duties across the globe ranging from peacekeeping to providing humanitarian aid, enforcing anti-terrorism measures to helping combat the international drugs trade."