A somewhat speeded up video of the climb up the Clock Tower to stand next to Big Ben when it bongs the hours. I suspect the sound of feet on the steps is not real.
The video was mentioned by the Parliament Twitter manager.
The video goes a bit further than the public tours, as it goes above the bells to the lantern on the top of the Tower. Incidentally, this is lit whenever the House of Commons is sitting, so you can look up and always know if the MPs are nattering at that very moment in the Commons.
For details of how to climb the Clock Tower yourself – click here.