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Clock tower housing Big Ben more damaged than first thought

The tower housing the famed Big Ben clock at the Houses of Parliament was more badly damaged by German bombs during the Second World War than originally thought, experts said on Thursday, as the bill for its restoration soared.

Famed clock tower was hit by German bombs during the Second World War

The Elizabeth Tower, housing the Big Ben clock, suffered more damage than first thought during the Second World War. (Toby Melville/Reuters)

The tower housing London's famed Big Ben clock at the Houses of Parliament was more badly damaged by German bombs during the Second World War than originally thought, experts said on Thursday, as the bill for its restoration rose by nearly 20 million pounds ($35 million Cdn).

The 177-year-old Elizabeth Tower has been swathed in scaffolding for the past three years as craftsmen refurbish its stonework and famous 12-tonne clock.

Being able to get close to the 96-metre high tower has allowed them to spot other problems like damage caused by pollution and asbestos.

The House of Commons and House of Lords Commissions said they had been told that to restore the tower to its previous splendour, the budget would need to rise from 61.1 million to 79.7 million pounds.

Ian Ailles, director general of the House of Commons, said the task of restoring the tower had been more complex than anticipated.

Understanding "the full extent of the damage to the tower was impossible until the scaffolding was up," he said in a statement.

A worker gilds cast iron roof elements on the Elizabeth Tower at Westminster Palace. (UK Parliament/Jessica Taylor/Handout/Reuters)

Among other problems, bomb damage inflicted on the tower during the war had been found to be more extensive than first thought.

Although the tower survived Nazi bombing, its roof and dials were damaged in a May 1941 air raid which destroyed the main House of Commons chamber.

The latest refurbishment of the structure, during which its 13-tonne Big Ben bell has been largely silenced, is expected to be finished next year.

Work on the structure — renamed the Elizabeth Tower in 2012 — is separate from the planned full-scale restoration of the Palace of Westminster which has been estimated to cost four billion pounds and is due to start in the mid-2020s.

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