Tension at the Gibraltar border: Defiant Spanish cops provoke the Brits by stamping passports - despite previous orders not to / Revealed: The behind-the-scenes power struggle that made the Spanish police chief at the Gibraltar border 'go rogue' / Gibraltar stages major drill to respond to serious air emergency in airport / Gibraltar tensions as Royal Navy carries out exercises near Spain / Spanish military plane overflies Gibraltar airspace twice during military exercises: British officials to lodge formal complaint / UK ordered to withdraw military base from Gibraltar as row with Spain deepens