the scene just after 11 am, going by previous experience it would take between an hour and 2 hours to get in so i left it.
later on about 2 pm i was told that the queue was about 3 times that length, this happens every time there is a special event and to a lesser extent on a weekday when a cruise liner is in.
english heritage seem to keep staff numbers at the lowest possible level to cut costs whilst having the cheek to raise admission prices.