Under the Brussels Agreement signed between the governments of the United Kingdom and Spain, the former agrees to enter into discussions with Spain over Gibraltar, including sovereignty.

The Brussels Agreement, 1984, was an agreement between the governments of the United Kingdom and of Spain concerning the territorial dispute over Gibraltar. The agreement was criticised by Gibraltar politicians for limiting the participation of Gibraltarians in their self-determination.

Gibraltar is a British Overseas Territory and city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the Atlantic Ocean. It has an area of 6.8 km² (2.6 sq mi) and is bordered to the north by Spain. The landscape is dominated by the Rock of Gibraltar, at the foot of which is a densely populated town area. Gibraltar is home to around 34,000 people, primarily Gibraltarians.