The Spanish Government say they are hopeful of securing a deal with the UK over the future of Gibraltar following Brexit negotiations.
The UK and Gibraltar are set to leave the European Union on March 29, 2019, and talks between the two territories have been underway, alongside the main discussions between Britain and the EU.
Gibraltar, a UK territory on the southern tip of the Iberian Peninsula, overwhelmingly voted to remain (96% voted remain) in the EU referendum in 2016. But overall, 51.9% of voters in the UK wanted to leave.
It is believed that those in Gibraltar are keen to keep the free movement of people across the border in Spain after Brexit.
Spain's Foreign Minister, Alfonso Dastis, says the two governments have discussed border controls and taxes but his main priority is Gibraltar' s airport.
Dastis says talks have focused on the possible joint use of Gibraltar airport and also the sharing of data between the UK and Spain for Gilbratar residents, to prevent tax avoidance.
Spain do not see the land in which the airport is on as British territory.
Dastis says the Spanish Government do still hope to recover the territory but are not using these Brexit discussions as a tool to complete that.
There has been a long-running dispute between Spain and the UK as to whether Gibraltar belongs to Britain or Spain.
The Military in Gibraltar
Gibraltar, despite being 1091.57 miles away from London, has held a military importance.
The British Army has been in Gibraltar since it became a UK territory more than 300 years ago.
'Gibraltarians' took up arms as the Gibraltar Volunteer Corps between 1915-1920 and again as the Gibraltar Defence Force shortly before the outbreak of World War II.
During the war, the territory was used as a convoy collection and as a base for anti-submarine operations.
This later became the Royal Gibraltar Regiment, which remains as the only formed Army unit in Gibraltar.
In 1991, the last UK-based infantry battalion left the territory, leaving the Rock to be defended by the Royal Gibraltar Regiment.
Sub-units remain, with responsibility for signals and infrastructure, and several Army posts in the tri-service headquarters.
Gilbratar has remained as a Permanent Joint Operating Base for UK operations in the region.
The RAF also operate in Gibraltar. The base and runway is close to prohibited Spanish airspace to the north and the 1,360 feet high Rock of Gibraltar only a quarter of a mile to the south makes it a difficult runway to use.
With Gibraltar sitting on the Mediterranean Sea, Falcon and Hawk aircraft which work with the Royal Navy in Gilbratar exercise waters can be seen at the base.
The Navy has two fast Patrol Boats that make up the Royal Navy's Gibraltar Squadron.
HMS Sabre and HMS Scimitar protect Gibraltar's shoreline and support ships in the Strait of Gibraltar.