A 2002 protest against British and Spanish talks about joint sovereignty of Gibraltar. Photograph: Anton Meres/Reuters
Spain has told a UN gathering it has formally presented Britain with a proposal for joint sovereignty of Gibraltar – an offer angrily rejected by the British overseas territory.
The territory on Spain’s southern tip has long been the subject of an acrimonious sovereignty row between London and Madrid, which wants Gibraltar back after it was ceded to Britain in 1713.
Since Britain’s June vote to leave the European Union, Madrid has upped its rhetoric, arguing that Gibraltar should come back into the Spanish fold to continue enjoying much-needed EU benefits.
Gibraltar’s economy, which is based on the financial services sector, tourism and online gaming, depends in large part on its access to the EU’s single market.
“Spain has formally invited the United Kingdom to open negotiations to reach an agreement so that the mandates of European Union treaties keep being applied in Gibraltar,” Spain’s UN ambassador Roman Oyarzun told a committee on Tuesday, according to a copy of his speech.
He proposed joint sovereignty “which would allow Gibraltar to remain in the EU”.
Under the proposal Gibraltarians would be able to keep their British nationality and would also be able to gain Spanish citizenship.
The idea of joint sovereignty is not new and such a proposal was etched out between Britain and Spain in 2001 and 2002. But it was binned after Gibraltarians rejected it in a November 2002 referendum.
In the committee meeting Gibraltar’s chief minister, Fabian Picardo, rejected the proposal outright, pointing to past rows with Spain affecting the crucial land border, which many Spaniards cross every day to work in the British territory.
In a 2013 row over disputed waters, for instance, Spain upped border checks, creating hours-long logjams and prompting the European commission to intervene.
Gibraltar now fears that it will be at the mercy of Madrid without the protection of the EU.
“When it comes to the question of whether we will transfer all or any part of our sovereignty to Spain our answer will never change,” Picardo said.
“It is simple: No way, Jose! You will never get your hands on our Rock. Never.”
Peter Wilson, the UK’s deputy permanent representative at the UN, said Britain would not enter any negotiations with which Gibraltar was not content.