The Archbishop of Canterbury has spoken at a special service at St Martin-in-the-Fields in Trafalgar Square, remembering Nelson Mandela.
Mr Mandela's key moments in London include Baroness Lawrence crediting him with helping their efforts to get justice for Stephen.
Images of Nelson Mandela's many visits to the capital.
Boris Johnson is at South Africa House where floral tributes are growing for Nelson Mandela.
– Boris Johnson, Mayor of London
I've come to pay my condolences on behalf of Londoners to a man who not only brought his country together but brought the whole world together in a way that no other statesman, no other leader I can think of, has achieved in the last century.
The Mandela statue in Parliament Square is now a garden of remembrance for those wanting to leave floral tributes
Speaker John Bercow has said he confidently expects Monday's sitting of the House of Commons to be devoted to honouring Nelson Mandela.
Mr Bercow said the detail of the timetable was not finalised but he expected tributes to South Africa's first black president to be the "principal occupation" on Monday.
MPs will be able to recognise a man the Speaker described as an "icon".
David Cameron asked for the Downing Street flags to fly at half mast following news of the death of Nelson Mandela.
Ppl celebrating Mandela's life outside SAH. Head of ANC London says the city played vital role in anti-apartheid movement @itvlondon
Two youngest Mandela daughters received news of their father’s death during London premiere of 'Long Walk to Freedom'
They immediately left the cinema, a statement says
This is Nelson Mandela's first television interview from 1961 when he was a young activist in the ANC party.
He tells an ITN reporter how the Sharpville Massacre the year before, in which 69 black protesters were shot dead by police, had led him to abandon his nonviolent approach.