The European Union flag flies alongside the Gibraltarian flag and Britain's Union Jack at the border in the British overseas territory of Gibraltar, historically claimed by Spain, November 23, 2018. REUTERS/Jon Nazca

MADRID (Reuters) - Spain on Friday insisted that a Brexit deal should make clear Madrid would have a direct say how the future relationship between the EU and Britain could impact Gibraltar, and this would have to be discussed bilaterally.

“It is clear, and the government is determined, that it must be absolutely guaranteed that any agreement between the European Union and Britain require the prior approval of Spain, relating to Gibraltar,” government spokeswoman Isabel Celaa said.