Boris Johnson has pledged that the UK’s support for Gibraltar will remain “implacable and rock-like” during Brexit talks amid claims of an EU “land grab” for the territory.

The Foreign Secretary called Gibraltar’s Chief Minister Fabian Picardo to repledge the UK’s support on Friday night and issued a message of support online.

“I wanted to reiterate that the UK remains implacable and rock-like in our support for Gibraltar,” he wrote in a message on Facebook.

“As the Prime Minister herself said earlier this week, we are clear that Gibraltar is covered by our exit negotiations, and we have committed to involving Gibraltar fully in the work that we are doing.”