The court was shown CCTV footage of the killers stalking their target for much of the night before striking outside the Woody Grill kebab shop in Kilburn.
Sabrina Gachette, who sat in court with her mother throughout the trial, said:
Seeing that was scary. How many times did they see us but not once did I see them. They knew there was girls out there.
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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.