Police have released CCTV footage of people who were in the area on the night that Samuel died.
They are still trying to identify around 32 people who can be seen in the footage - which was taken in and around the shops outside Penge East Station between 21:40 and 22:00 on Saturday 12 February 2011.
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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.