Families of young victims of knife crime have gathered in Brixton for a service in their memory.
The Love2Remember memorial was held in honour of Junior Nkwelle, Edvin Johnson, Zac Olumegbon and Damilola Taylor.
Piers Hopkirk reports.
More top news
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.