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Last Updated: Saturday, 29 October 2005, 18:01 GMT 19:01 UK
In pictures: Big Ben's big turn off

St Stephen's Tower clock face

Big Ben's chimes are stopped to allow work on St Stephen's Tower clock and bells.

St Stephen's Tower clock

The hands of the clock on St Stephen's Tower are moved to the 12 o'clock position while maintenance work is carried out.

Big Ben

Engineers are replacing rubber hammers on the hour bell and three of the quarter hour bells.

Bell hammer seals

A Westminster engineer holds a worn hammer seal of Big Ben and two replacement seals.

Clock mechanism

Trainee clock mechanic Huw Smith makes adjustments to the settings of the clock.

Clock mechanism

The clock is expected to restart at about 1600 GMT on Sunday, ending its longest switch off in 22 years.

St Stephen's Tower

The stopping of the clock coincides with the end of British Summer Time and the start of Greenwich Mean Time - clocks have gone back an hour.





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