On 19 November 2025, the ESC, in collaboration with the Oxford University Spanish Society, hosted a seminar entitled "Beyond the Rock and the Reef: Britain's Overseas Territories in Transition." Chaired by Sandra León, Ramón Areces Visiting Fellow at the European Studies Centre, the seminar featured Peter Clegg, Professor of Politics and International Relations and Head of the School of Social Sciences at the University of the West of England, with David Garciandia Igal (Oriel College, Oxford) serving as discussant. Drawing on his extensive research on the Caribbean and Britain's Overseas Territories, Clegg explored the constitutional, legal and geopolitical challenges facing Britain's remaining territories as they navigate the legacies of empire alongside new pressures arising from Brexit, international law, environmental change and shifting global politics.
Clegg began by observing that Britain's fourteen Overseas Territories occupy a distinctive position within the international system. They are neither colonies in the traditional sense nor fully independent states. Most possess elected governments, substantial domestic autonomy and self-governing institutions, yet the United Kingdom retains ultimate responsibility for defence, foreign affairs and important aspects of constitutional governance. This hybrid constitutional status, he argued, places the territories in an increasingly complex position as they confront evolving international legal norms, changing relationships with Westminster and growing external scrutiny over governance and financial regulation.Although Britain's Overseas Territories receive relatively little attention in domestic political debate, Clegg emphasised that they remain strategically significant. Together they provide military facilities, major financial centres, extensive maritime zones and over ninety per cent of the UK's biodiversity. Yet they vary enormously in their constitutional arrangements, economic structures and local identities. Some are prosperous financial hubs, others depend heavily on fisheries or tourism, while a handful continue to receive substantial financial support from the United Kingdom. Understanding the Overseas Territories therefore requires moving beyond treating them as a single constitutional category and recognising the distinct political, economic and historical circumstances of each.The lecture first examined the Chagos Archipelago, which Clegg described as the most significant constitutional development affecting the Overseas Territories in decades. He traced the dispute to the 1960s, when Britain detached the islands from Mauritius before Mauritian independence and created the British Indian Ocean Territory to facilitate construction of the joint UK-US military base on Diego Garcia. The forced removal of the indigenous Chagossian population and the separation of the islands from Mauritius have remained central to subsequent legal and political disputes.
Clegg argued that the proposed transfer of sovereignty to Mauritius reflects the cumulative force of international legal developments rather than simply a political decision by the present British government. He pointed to the 2019 advisory opinion of the International Court of Justice, subsequent United Nations resolutions and later international tribunal decisions, all of which increasingly challenged Britain's legal position. While critics have characterised the agreement as an unnecessary surrender of sovereign territory, Clegg suggested that successive British governments had recognised the growing difficulty of sustaining Britain's claim in the face of mounting international legal pressure. The proposed settlement preserves the strategically important military base on Diego Garcia through a long-term lease while returning sovereignty to Mauritius, illustrating the continuing tension between geopolitical interests, international law and historical justice.
Importantly, Clegg cautioned against treating the Chagos case as a precedent for Britain's other Overseas Territories. Unlike Gibraltar or the Falkland Islands, Chagos combines the forcible displacement of its indigenous population, a distinctive constitutional history and an unusually strong body of international legal opinion questioning Britain's sovereignty. Although the agreement has prompted speculation about the future of other disputed territories, he argued that the legal circumstances surrounding Chagos remain exceptional.
Brexit formed a second major theme of the lecture. Clegg argued that its consequences for the Overseas Territories have often been underestimated despite proving significant in several cases. Gibraltar provided the clearest example. Before Brexit, Gibraltar's economy, labour market and everyday life were deeply integrated with neighbouring Spain through the wider European Union framework. Thousands of Spanish workers crossed the frontier each day, while Gibraltar itself benefited from relatively frictionless movement despite not participating fully in either the Schengen Area or the Customs Union.
Britain's departure from the European Union fundamentally altered this framework. Clegg described the recent UK-Spain agreement as an attempt to preserve practical cooperation while accommodating competing sovereignty claims. Under the proposed arrangements, border checks would move from the land frontier to Gibraltar's airport and port, allowing continued free movement across the Spanish border. Ironically, he suggested, Brexit may ultimately leave Gibraltar more closely integrated with the European Union than before, illustrating the unintended constitutional consequences of Britain's withdrawal.
The Sovereign Base Areas in Cyprus offer another example of this paradox. Although Britain retains sovereignty over Akrotiri and Dhekelia, most residents are Cypriot, and many aspects of everyday life continue to operate within the wider legal and economic framework of the Republic of Cyprus. European Union law continues to apply in many practical areas under the Brexit settlement, demonstrating how formal sovereignty increasingly coexists with extensive practical integration.
Even the Falkland Islands, geographically distant from Europe, have experienced indirect consequences. The introduction of tariffs on fisheries exports, particularly squid destined for Spain, has imposed additional costs on one of the islands' principal industries. Brexit therefore produced important economic consequences even for territories whose relationship with the European Union had received little public attention during the referendum campaign.
A further theme concerned the constitutional relationship between the United Kingdom and the Overseas Territories themselves. While elected local governments enjoy substantial autonomy, British-appointed Governors continue to exercise important reserve powers over defence, external affairs, internal security and, in some territories, legislation itself. These powers remain controversial because Governors are accountable to ministers in London rather than to elected representatives within the territories.
Clegg illustrated these constitutional tensions through recent examples. In Bermuda, legislation legalising cannabis was prevented after the Governor withheld Royal Assent on the grounds that it conflicted with Britain's international treaty obligations. In the Cayman Islands, by contrast, the Governor intervened to introduce civil partnerships after the elected legislature declined to do so, reflecting Britain's human rights obligations. Such cases demonstrate the continuing constitutional dilemma at the heart of Britain's relationship with the Overseas Territories: local democratic institutions enjoy extensive authority, yet ultimate legal responsibility continues to rest with Westminster.
Questions of governance and accountability formed another important strand of the lecture. Clegg reviewed several major corruption scandals, including earlier interventions in the Turks and Caicos Islands and the more recent Commission of Inquiry into governance in the British Virgin Islands. The latter documented serious weaknesses in public administration and procurement, prompting the UK government to threaten direct rule unless substantial reforms were implemented. Such episodes, he argued, complicate calls for greater constitutional autonomy by reinforcing Britain's claim that continued oversight remains necessary where governance standards fall short.
Financial regulation provides another continuing source of tension. Westminster has increasingly sought greater transparency through beneficial ownership registers in Overseas Territories with major financial services sectors. Territorial governments have resisted these measures, arguing that they constitute constitutional overreach and threaten the competitiveness of economies that rely heavily on financial services. Yet Parliament ultimately retains sovereign legislative authority and has shown itself willing to intervene where it considers Britain's wider international obligations to be engaged.
The lecture also considered wider questions of representation and democratic voice. Since Westminster retains the power to legislate for the Overseas Territories, should they enjoy representation in Parliament? Although the proposal has periodically attracted support within British politics, Clegg noted that the territories themselves have generally shown little enthusiasm. Many fear that parliamentary representation would encourage greater British involvement in domestic affairs, including taxation and financial regulation, thereby weakening rather than strengthening local autonomy.
The discussion broadened these themes further. David Garciandia Igal explored the relationship between international law and decolonisation, contrasting the cases of Chagos and Gibraltar. Whereas international law increasingly prioritises Mauritian territorial integrity in the Chagos dispute, Gibraltar presents a much more difficult tension between territorial integrity and the principle of self-determination for its present-day population. Clegg acknowledged that these competing principles do not always sit comfortably together and that no straightforward legal solution exists where historical sovereignty disputes intersect with the democratic wishes of contemporary communities.
Audience questions examined the future of the Diego Garcia military base, the financial relationship between Britain and the Overseas Territories, comparisons with French, Dutch and New Zealand models of overseas governance, and the longer-term prospects for constitutional change. Clegg argued that, despite continuing disagreements, the existing constitutional framework has proved remarkably durable. Since the transfer of Hong Kong in 1997, no inhabited Overseas Territory has left British sovereignty, and he regarded further moves towards independence as unlikely in the foreseeable future.
Looking ahead, Clegg suggested that gradual constitutional evolution rather than dramatic change remains the most likely trajectory. The Chagos agreement will undoubtedly reshape Britain's overseas presence, while Brexit has already altered the constitutional and economic relationships of territories such as Gibraltar and the Sovereign Base Areas. Yet most Overseas Territories continue to value their constitutional connection with Britain while seeking greater flexibility in how that relationship operates.
The seminar concluded by highlighting the enduring complexity of Britain's remaining Overseas Territories. They remain products of empire, yet they are also contemporary political communities with distinctive identities, democratic institutions and strategic importance. Their future will continue to be shaped by the interaction of international law, domestic self-government, geopolitical interests and Britain's own evolving understanding of its post-imperial role. Far from being relics of Britain's imperial past, Clegg argued, the Overseas Territories remain active participants in some of the most important constitutional and international legal debates of the twenty-first century.
By Julie Adams (ESC Administrator)

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