A major airport has been shut down this morning after holidaymakers reported seeing a massive emergency presence responding to a "crash". Norwich Airport is expected to remain closed until 12.30pm today following "an incident" on the airfield's runway, that has seen shocked passengers awaiting flights take to social media. Holidaymakers at the site today reported seeing a large emergency presence rush to the scene, with one saying they heard "crash! crash!" over the radio. They said: "We could