In February 2026, the agreement between the EU and the UK eliminated the land border between Gibraltar and Spain, integrating this 6.7 km territory into the Schengen area – a practical response after five years of post-Brexit negotiations.
The agreement is based on a unique hybrid model where Madrid exercises “functional sovereignty” through Spanish agents deployed at the airport and port, without formally challenging the British legal sovereignty inherited from the 1713 Treaty of Utrecht.
However, the agreement remains fragile, with potential political changes in Spain, regulatory divergences between London and Brussels, or tensions related to the presence of the British military that could hinder ratification until 2027.
The announcement of the Gibraltar agreement at the beginning of 2026 marks a significant milestone in the contemporary history of this 6.7 km territory at the southern tip of the Iberian Peninsula. This agreement, involving Brussels, London, Madrid, and the government of Gibraltar, aims to resolve one of the sensitive consequences of Brexit – the existence of a land border between this British overseas territory and the Schengen area.
The current situation stems from the 1713 Treaty of Utrecht, through which Madrid ceded Gibraltar to London after the War of Spanish Succession. Gibraltar has gradually developed autonomous institutions, and two referendums in 1967 and 2002 confirmed the rejection of returning to Spanish sovereignty by over 99% of the population.
The Brexit referendum in 2016 created a challenge, as while 52% of the UK voted to leave the EU, 95.9% of Gibraltarians voted to remain, highlighting the territory’s structural dependence on its European environment.
To address these challenges, negotiations began in 2020 and culminated in the recent agreement that includes the integration of Gibraltar into the Schengen area, relocation of controls to the port and airport, and a new economic framework for Gibraltar’s relations with the EU.
These developments represent a new chapter in Gibraltar’s history and in the wider context of European cooperation. The agreement’s success will depend on various factors, including political stability in Spain, regulatory harmony between the UK and the EU, and managing the presence of British military forces in the region.
Overall, Gibraltar is positioned as an experimental ground for a new form of shared sovereignty in the 21st century, offering a pragmatic solution to the challenges posed by Brexit and paving the way for a new era of European coexistence based on economic interdependence and security cooperation.
