Boris Johnson said the crowds that had turned out to pay their respects to Baroness Thatcher were "an astonishing comment on her power".
He told ITV News: "I think it's an astonishing comment on her power, the way she spoke to people, after all the controversy over whether this was the right way to commemorate her today, the right kind of funeral to have, look at the size of the crowds who have turned out to pay their respects."
The Queen led mourners at the ceremonial funeral of Baroness Thatcher in St Paul's Cathedral today as thousands lined the streets of London.
Falklands residents say they owe their freedom and their riches to Margaret Thatcher. Today they paused to reflect and to remember.
Baroness Thatcher was honoured with a ceremonial funeral at St Paul's Cathedral in the presence of the Queen and dignitaries.