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13 August 2010, 09:53 | Updated: 13 August 2010, 09:59
3 men have abseiled down Big Ben's huge clock tower to check for damage for the Bell's annual summer clean.
All of them had to wear ear defenders to protect them from it's massive noise.
The clock's keeper says it may look risky but it's actually very safe and much cheaper and quicker than using a scaffold.