David Hopper, general secretary of the Durham Miners’ Association, said her death was a “great day” for coal miners.
The ex-miner, who turned 70 today, spent all of his working life at Wearmouth Colliery.
He said: “It looks like one of the best birthdays I have ever had.
"There’s no sympathy from me for what she did to our community. She destroyed our community, our villages and our people.
"For the union this could not come soon enough and I’m pleased that I have outlived her.
"It’s a great day for all the miners, I imagine we will have a counter demonstration when they have her funeral.
"Our children have got no jobs and the community is full of problems. There’s no work and no money and it’s very sad the legacy she has left behind.
"She absolutely hated working people and I have got very bitter memories of what she did. She turned all the nation against us and the violence that was meted out on us was terrible.
"I would say to those people who want to mourn her that they’re lucky she did not treat them like she treated us."
Colleagues of Arthur Scargill, the former leader of the National Union of Mineworkers, who clashed bitterly with Mrs Thatcher during the 1984/85 miners’ strike, said he was unlikely to make any comment.
Burnistoun creator Robert Florence tweeted: “I wish there was a Margaret Thatcher statue in Glasgow. I’d like to be seen on the news toppling it and hitting it with my shoes.”
Comic book writer and Kick-Ass creator Mark Millar said: “Anybody sad about Thatcher today has clearly not read a newspaper since 1979.”