The Mayor of London said that Margaret Thatcher's greatest achievement was to "knock on the head the defeatism and the pessimism of the post-war consensus".
"She freed millions of people to buy their own homes, to buy shares in British companies and yes, sometimes the things that she said were tough, but I think when you look back, she was overwhelmingly right in her judgements," he said.
"She was right about the unions, she was right about the threat of Soviet communism and I think she's been proved overwhelmingly right about the euro."
He added that her memory would live on and that Britain remained "very much in her debt".
Email your tributes or memories to firstname.lastname@example.org