King Charles arrives at Buckingham Palace

STORY: Charles is scheduled on Saturday to meet the prime ministers of the 14 other countries where he is head of state and workers in the emergency services who are helping to stage the funeral.

The state funeral on Monday will be attended by nearly 100 presidents and heads of government.

It is likely to be one of the biggest ceremonial events ever held in Britain and London's police force said it will be the biggest security operation it has ever undertaken