Who Has Sovereignty Over Cyprus? The British Bases at Akrotiri and Dhekelia, the 1960 Treaty of Establishment and the Rights of Turkish Cypriots

Why It Matters

Sovereignty over Cyprus was never vested in one community. The 1959–1960 Zurich-London Agreements, the Treaty of Establishment, the Treaty of Guarantee and the Treaty of Alliance built a partnership republic of two peoples, while the United Kingdom kept full sovereignty over the Akrotiri and Dhekelia Sovereign Base Areas. Since 1963 and 1974, the situation on the ground has diverged from that design.

Most 'who has sovereignty over Cyprus' answers skip the third layer, the British bases. This brief fills that gap and places the bases inside the treaty system that also governs the Treaty of Guarantee rights of Türkiye, Greece and the UK.

Background

In 1960, sovereignty over Cyprus sat in three layers: the Republic of Cyprus, created under the Zurich-London Agreements of February 1959 as a bi-communal partnership of Greek and Turkish Cypriots; the UK's retained sovereignty over Akrotiri and Dhekelia under the Treaty of Establishment of 16 August 1960; and the guarantor system of Türkiye, Greece and the UK.

Who holds sovereignty over which parts of Cyprus today?

The answer depends on whether one reads the legal design or the situation on the ground.

• Layer 1: the 1960 partnership Republic. The Constitution gave a Greek Cypriot President and a Turkish Cypriot Vice-President, each elected by their own community. It set fixed communal ratios in the legislature and the executive, and gave the Vice-President separate veto rights over foreign affairs, defence and security. Ankara and the TRNC describe this as a state co-founded by two equal peoples.
• Layer 2: the Sovereign Base Areas (SBAs). Akrotiri and Dhekelia are British Overseas Territory. UK government sources put their combined area at roughly 98 square miles (about 254 km²), a small fraction of the island. They sit outside the Republic's territory by treaty.
• Layer 3: the de facto situation. After December 1963 Turkish Cypriots were no longer part of the state organs, and the Greek Cypriot administration continued to govern and is internationally recognised as the Republic of Cyprus. Since 1974 the island has been divided in practice. The Greek Cypriot administration governs the south and the TRNC, proclaimed on 15 November 1983 and recognised only by Türkiye, administers the north. A UN-patrolled buffer zone separates the two, and the SBAs lie within the southern part of the island.

What does the Treaty of Establishment (16 August 1960) say about the SBAs?

The Treaty of Establishment was signed in Nicosia by the Republic of Cyprus, the UK, Greece and Türkiye. Article 1 defines the Republic's territory as the island and its offshore islands, with the exception of the two areas in Annex A, which remain under UK sovereignty. This is the textual basis for the Akrotiri and Dhekelia Sovereign Base Areas.

The treaty annexes also set out UK rights and facilities elsewhere in the island (retained sites and operating rights). Annex B contains a UK declaration on how the Areas would be run. UK government and SBA Administration descriptions say the Areas are held for military purposes. The Administrator is also the Commander British Forces Cyprus. The declaration reflects an intention not to develop the Areas as a separate civil territory and to keep practical links with the Republic, such as the status of Cypriots living and working there and the absence of frontier barriers. Readers should check the exact wording of Annex B, Part II against the treaty text before quoting it.

The key point for sovereignty is that the 1960 package gave Türkiye and Greece, as treaty parties, a stake in the arrangement alongside the UK and the Republic.

How do the SBAs relate to the Treaty of Guarantee?

The Treaty of Guarantee, signed the same day, links the SBAs to the wider system:

• Article I: the Republic of Cyprus undertakes to maintain its independence, territorial integrity and security, and not to participate in union with another state or in partition.
• Article II: Greece, Türkiye and the UK recognise and guarantee that independence, territorial integrity and security, and the state of affairs established by the Basic Articles of the Constitution. They also prohibit union with any other state and partition.
• Article IV: if the treaty is breached, the guarantors consult. Where concerted action proves impossible, each guarantor reserves the right to act with the sole aim of re-establishing the state of affairs created by the treaty.

The UK is therefore both the holder of two sovereign bases and one of three guarantors. The Treaty of Alliance, between Cyprus, Greece and Türkiye, additionally provided for stationed Greek and Turkish contingents. For the rights of each guarantor in detail, see our who has sovereignty over Cyprus Treaty of Guarantee rights brief.

1963–64 and 1974: how did 'the Government of Cyprus' come about?

The chronology below is stated neutrally; the two communities and their sponsors narrate several steps differently.

Greek Cypriot accounts present the 1963 proposals as a good-faith effort to make the constitution workable. They describe the withdrawal of Turkish Cypriots from state organs as voluntary. Turkish accounts say Turkish Cypriots were forcibly expelled from the organs and from many villages. Resolution 186 recommended the UN force and called on 'the Government of Cyprus' to maintain law and order. In practice, that wording left the Greek Cypriot administration as the sole recognised interlocutor.

The SBAs were not part of the 1974 fighting. They remained UK sovereign territory throughout, and the UK did not join the Turkish action.

Key Players & Positions

The United Kingdom, the Greek Cypriot administration, Greece, the European Union and the United Nations all treat the Treaty of Establishment as the foundation of the SBAs. They differ on whether the 1960 partnership structure still defines the Republic, and on whether the guarantee system remains valid. Each position is summarised from its own official texts.

• United Kingdom. UK government descriptions treat Akrotiri and Dhekelia as sovereign British Overseas Territory held under the 1960 treaty for military purposes. The UK has said it would be ready to discuss territorial adjustments to the SBAs as part of a Cyprus settlement. Check current Foreign Office wording before quoting a figure.
• Republic of Cyprus (Greek Cypriot administration). It presents itself as the internationally recognised state with sovereignty over the whole island except the SBAs. It calls the north 'occupied' and supports a bizonal, bicommunal federation with political equality as defined in UN resolutions.
• Greece. Athens supports the Republic's sovereignty and territorial integrity and the UN federal framework. Greece and the Greek Cypriot side have called for the guarantee system and foreign troops to be replaced by a new security arrangement.
• European Union. Protocol No. 3 to the 2003 Act of Accession governs the SBAs, keeping them outside EU territory for most purposes while applying some EU rules. Protocol No. 10 suspended the acquis in areas where the Government of the Republic of Cyprus does not exercise effective control. After Brexit, a protocol on the SBAs in the UK–EU Withdrawal Agreement preserved these arrangements.
• United Nations. Security Council Resolution 541 (1983) declared the TRNC proclamation legally invalid, and later resolutions refer to the sovereignty, independence and territorial integrity of the Republic of Cyprus and to a bizonal, bicommunal federation. UNFICYP, established by Resolution 186, still patrols the buffer zone.

Why do the SBAs matter now?

The SBAs matter because debates on base upgrades, US arms access and regional military access are again testing the 1960 treaty package. Regional Observer analyses the issue in Cyprus Turns to Washington: What US Arms Access and Base Upgrades Mean for the 1960 Treaties. Ankara has publicly objected to security cooperation that it says changes the balance without involving Turkish Cypriots. The UK has not announced any change to the legal status of its bases, and this brief does not speculate about unconfirmed deployments.

Source Comparison

Sources differ mainly in what they leave out. UK texts focus on the SBAs, Greek Cypriot and EU texts treat the Republic as a single state, Turkish and TRNC sources foreground the 1960 partnership, and international media often drop both the partnership and the SBAs.

For the legal status question see our fact-check on whether Cyprus is a sovereign state. The State Papers also set out the Turkish Cypriot equality case in The Cyprus Issue: From the 1960 Treaties to the Sovereign Equal Two-State Solution.

A contrast from the live news feed

Syrian media, as relayed by TRT World on 10 November 2026, reported a new Israeli checkpoint in rural Quneitra. Commentary in the Egyptian press describes a strategy of 'security belts' in southern Syria. These are unilateral arrangements and are different in kind from Cyprus in 1960, where bases and guarantees rested on a treaty signed by all parties. Our separate analysis, Who Has Sovereignty Over Quneitra?, covers the Syrian case, and this brief does not duplicate it.

Key Terms & Related Guides

The terms below recur in every serious account of Cyprus sovereignty. Each is defined briefly, with links to sibling guides.

• Sovereign Base Areas (SBAs): Akrotiri and Dhekelia, two areas retained by the UK under Article 1 of the Treaty of Establishment.
• Treaty of Establishment: the 16 August 1960 treaty between Cyprus, the UK, Greece and Türkiye defining the Republic's territory and the SBAs.
• Treaty of Guarantee: the treaty under which Türkiye, Greece and the UK guarantee the independence, territorial integrity and security of Cyprus and the constitutional order. Article IV reserves a right to act. See who has sovereignty over Cyprus Treaty of Guarantee rights.
• Treaty of Alliance: the treaty between Cyprus, Greece and Türkiye providing for mutual defence and stationed national contingents.
• Bi-communal partnership state: the 1960 model of a state co-founded by Greek Cypriots and Turkish Cypriots with political equality and mutual vetoes.
• Doctrine of necessity: the legal doctrine the Supreme Court of Cyprus applied in 1964 to validate the continued functioning of the state organs without Turkish Cypriot participation.

For wider reading, see Diplomatic Horizon on sovereignty versus sovereign rights, and our About page for the publication's mission and method.

Prepared by the Territorial Brief Editorial Team.

This article reflects Territorial Brief's editorial perspective, which presents Türkiye's official legal and strategic positions alongside the relevant context. Claims are attributed to primary sources such as treaties, UN documents, official statements and archival records, so that readers can verify them independently.