Cyprus was a British protectorate and Crown colony until 1960, when it gained independence. Since 1922, the colonial flag of British Cyprus, which included Acrotiri and Dekelia, has been used on the territory of Cyprus. However, after Cyprus' independence, a separate flag was not created for Akrotiri and Dekelia. Therefore, the Union Jack remained the flag. This flag is flown over official buildings, border crossings and is sometimes used as the de facto flag of the Royal Air Force. This decision was made by the leadership of the military forces of Akrotiri and Dekelia, as well as because of the local population's attachment to the British flag.

Akrotiri and Dekelia are British overseas territories that do not have an official flag. The unofficial flag of Akrotiri and Dekelia is often considered to be a green flag with two golden lions. This flag is used by the garrison in Dekelia and is derived from the colonial flag of Cyprus. The golden lions are derived from the coat of arms of the English King Richard I, due to his conquest of Cyprus and the creation of the Kingdom of Cyprus. The golden lions on green are widely used in the territory and also appear on the coat of arms of King Richard's School and on the flag of the Dekelia Sailing Club.