British Defence Forces

fleet of the Royal Navy

thumb|250px|The banner flown by lord-lieutenants. A lord-lieutenant ( ) is the British monarch's personal representative in each lieutenancy area of the United Kingdom. Historically, each lieutenant was responsible for organising the county's militia. In 1871, the lieutenant's responsibility over the local militia was removed. However, it was not until 1921 that they formally lost the right to call upon able-bodied men to fight when needed.

1940-1944 British Army auxiliary defence force

small, fortified towers built in the Thames and Mersey estuaries

part of the British Army's London District

contingents of infantry and cavalry soldiers charged with guarding the official royal residences in the United Kingdom

British anti-invasion preparations of the Second World War

artillery fortifications built to defend the southern coast of England by Henry VIII

system used for dispersing fog and smog from an airfield so that warplanes could land safely

Britain's Prisoner of War Interrogation Service facility used during and afrer World War II for prisoner detention, intelligence gathering, and war crimes investigation

UK ceremonial units

British civil defence organisation (1924-1941)