Spain's continuing sovereignty dispute with the United Kingdom over the territory where the airport stands (different from the generic one on Gibraltar itself) has seriously affected the airport's operations. On 2 December 1987, an agreement was signed between the governments of the United Kingdom and Spain to allow the joint civil use of the airport. The agreement foresaw the building of a new terminal in the neighbouring Spanish municipality of La Línea de la Concepción adjacent to the northern side of the existing frontier. However, the agreement was blocked by the Government of Gibraltar, led from 1988 by Joe Bossano. As a result, the agreement was never implemented.