For many people, the "Games Makers" epitomised the spirit of 2012.
Now, those Olympic heroes are making a bid for the Christmas Number One.
Here's Rags Martel.
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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.