London's Bravest Workers Give Big Ben A Clean
Monday 18th August 2014
The clockface in the Queen Elizabeth Tower has been cleaned for the first time since 2010.
Abseilers are cleaning the four faces of the clock tower for Big Ben, renamed last year from St Stephen's Tower.
Each clock face is expected to take a day for careful cleaning of the 312 pot opal glass pieces each.
The Great Clock will continue to measure time, but the hands of the clock will be temporarily paused.
The workers certainly need a head for heights - they are working over 60 metres in the air.
Steve Jaggs, the Deputy Keeper of the Clock, said: "The process is complex, and requires a real head for heights.
"We have an expert team who will ensure that the clock is thoroughly cleaned and that this piece of our national heritage is safeguarded for future generations."