Spain’s caretaker Minister for Foreign Affairs, José Manuel García-Margallo, claimed that he had held “confidential” talks on co-sovereignty with “personalities” in Gibraltar. However the minister gave no indication as to who he had spoken to, according to Spanish press reports.
A form of “nominal” co-sovereignty to be guaranteed UK, Spain and the EEC was proposed by Gibraltar Chief Minister, the late Sir Joshua Hassan, in January 1978, according to papers newly-released to The National Archives.