Ria Chatterjee reports.
There is a growing celebratory atmosphere at South Africa House in Trafalgar Square today. A strong smell of incense fills the air as crowds remember Mr Mandela with a constant flow of song and dance.
The shrine and the group are the focus of photographers, broadcasters, reporters, intrigued passers-by, and passengers on the top deck of passing buses.
The Queen visited a plaque commemorating Nelson Mandela's 1996 visit to Parliament after saying she was "deeply saddened" to learn of his death.
She was heard telling Commons Speaker John Bercow how 'William and Catherine' heard the news at the premiere of the film about the former South African President's life; Mandela: Long Walk To Freedom.
Honoured to visit South Africa House & sign the Condolence Book on behalf of London, in remembrance of Nelson Mandela http://t.co/Z4RM0goj6O
The Nelson Mandela statue in Parliament Square today.
The queue for the book of condolence at South Africa House is growing steadily, snaking around the building and down Duncannon Street.