Emergency services have been called to the Palace of Westminster where a man has scaled one of the buildings.Video on social media shows a barefoot man standing on a ledge holding a Palestine flag several metres up Elizabeth Tower, which houses Big Ben.

Emergency services have been called to the Palace of Westminster where a man has scaled one of the buildings.Video on social media shows a barefoot man standing on a ledge holding a Palestine flag several metres up Elizabeth Tower, which houses Big Ben.