- The three sites in London are among of 67 cultural areas in 41 countries
- They are deemed to be at risk from the forces of nature, and social, political, and economic change
- Internationally, the sites range from the Italian city of Venice to the little-known village of Pokfulam in Hong Kong
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A lamp in the tower which houses Big Ben is to be switched off for the first time in more than 70 years.
Sir Bruce entertained audiences for more than seven decades.
Work in the tower will also pause over the bank holiday weekend.