At Ludgate Circus, a crowd of about 50 protesters waved Socialist Worker placards, a sign reading "Anarchists Against Thatcher" and rainbow-hued "Peace" flags. Another held a sign demanding 'Where was her respect for Goldthorpe and the miners?' referring to Thatcher's campaign against the power of coal-mining unions.
Protester Hilary Jones said Thatcher had been strident in her beliefs "and her beliefs were so at odds to a large chunk of the population." "There was nothing for many of us to feel proud of during her time," she said.
But Conservative Party activist Lionel Voke said he credited Thatcher with the success of his business.
'We're here out of respect - to us, she was wonderful. I accept that not everyone sees it the same way, but it's the same if Tony Blair died -- I wouldn't necessarily come, but I'd expect him to be treated with respect, and I'd want him to rest in peace."
Ian Twinn said he had traveled from New York to mark the life-changing impact Thatcher had on him.
"I was a boy in the 1980s. Rightly or wrongly she changed the landscape of the UK forever, and she made me feel I could do anything," he said.
Thatcher, who led the Conservative Party from 1975 until she was forced to resign in 1990, remained involved in British politics for the next decade or so. She was named Baroness Thatcher of Kesteven after leaving office and served in the House of Lords.
She retired from public life after a stroke in 2002 and suffered several smaller strokes after that.