The unprecedented demand has sparked a huge logistical operation involving the Met, MI5 and the Armed Forces with Whitehall insiders fearing that central London could actually be full .
The Archbishop of York spontaneously visited mourners and royal fans camping along the banks of the Thames in London overnight as they queue to pay their respects to the Queen as she lies in state.
Up to a million mourners are expected to queue several miles for up to 35 hours across London to pay their final respects to Her Majesty Queen Elizabeth II from today until Monday.