A woman passes by a Remain campaign office one day after after Britain voted to exit the European Union, in Gibraltar on June 24, 2016.

Spain said on June 24, 2016 it was closer to asserting control over Gibraltar after Britain voted to leave the European Union, prompting London to jump to the defence of its overseas territory. / AFP / SERGIO CAMACHO        (Photo credit should read SERGIO CAMACHO/AFP/Getty Images)