TORONTO -- The Progressive Conservatives say Ontario Premier Kathleen Wynne's apology for the scandal over the cancelled gas plants in Oakville and Mississauga is "too little, too late."

After repeatedly rebuffing calls for an apology, Wynne finally went further than just saying she regretted the $585 million cost of the gas plant cancellations and said she was sorry.

The premier made the formal apology on TV Ontario's The Agenda, saying 11 times she was "sorry" for the mistakes the government made.

But Conservative Steve Clark says Wynne had plenty of opportunities to apologize in the past, but refused.

He said the Tories want a judicial inquiry into the gas plant cancellations, adding Wynne can "apologize to the judge too."

The Tories are trying to get the New Democrats to support their non-binding motion today to force the Liberals to allow a vote on their non-confidence motion over the cancelled gas plants.

Wynne's apology came after both she and her predecessor, former premier Dalton McGuinty, testified at a committee looking into the cancelled gas plants.

McGuinty said he made the political decisions to cancel the plants in Oakville and Mississauga, but had no idea what it would cost. He insisted it was the right thing to do in the face of widespread local opposition.

Asked whether McGuinty should have apologized, Wynne said she was also a part of the government at the time the decisions were made and put no distance between herself and the former premier.

"I'm in this chair now and it's my responsibility to level with the people of Ontario about how I see the situation and how I feel about the situation and what I'm hearing from them," she said.

"I'm hearing people say that they want to hear an apology for the parts of this that our government messed up. You know, the mistakes."

The opposition parties say the Liberals intentionally misled the public about the true cost of cancelling the gas plants.