McFly have been getting West End shoppers in the Christmas spirit by performing a free concert.
Tom Fletcher, Dougie Poynter, Harry Judd and Danny Jones have taken over the centre of Oxford Circus to sing three hit songs.
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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.