May 25 (UPI) — Canadian Prime Minister Mark Carney on Monday called a bid by the premier of Alberta to hold a referendum on separation a “dangerous bluff” that could produce deep regrets much like Britain’s decision to leave the European Union.

Carney, who was governor of the Bank of England when British voters opted by a narrow margin to approve “Brexit” in 2016, said the referendum proposal announced Thursday by Alberta Premier Danielle Smith risks economic consequences that its backers cannot predict and are not prepared for.

During a press briefing in Ottawa, the prime minister issued his strongest remarks yet on Alberta’s referendum, under which voters will be asked on Oct. 19 if they want to remain part of Canada or if the provincial government should initiate the process for holding a future, legally binding referendum on separation.

The risk in that, he said, is that the results of a referendum on whether to hold another referendum can be seen by many as the final word, even though proponents may say the results can merely be used for leverage.

“In these separation issues, it is often advanced that, ‘vote for this and it is a free option,’ or ‘vote for this, and we will strengthen our hand in a future negotiation.’ That is a very dangerous bluff,” Carney said. “I saw it firsthand in the U.K.”

Britain, he said, is “still trying to undo what people didn’t think they were voting for” with Brexit.

He said Albertans derive great economic benefits from federal government programs such its pension plans, health-care transfers and the Canadian version of Social Security for seniors which would disappear under separation.

Smith, leader of Alberta’s United Conservative Party, announced last week that a citizen-led petition was signed by well in excess of the 300,000 people required to trigger a vote on seceding from Canada’s federal confederation, despite polling showing widespread disapproval of the idea in the oil-rich western province.

She said she herself would vote against secession, but that it was necessary for Albertans to have their say.

“Kicking the can down the road only prolongs an emotional and important debate, and muzzling the voices of hundreds of thousands of Albertans who want to be heard is unjustifiable in a free and democratic society,” she wrote in an opinion piece published in the Calgary Herald.

Carney, leader of Canada’s Liberal Party, argues the 37-word referendum question is a complicated one in which residents were being asked about holding a second referendum rather than a straight-up question about remaining in Canada.

The question reads: “Should Alberta remain a province of Canada or should the Government of Alberta commence the legal process required under the Canadian Constitution to hold a binding provincial referendum on whether or not Alberta should separate from Canada?”

A poll published Monday by the Angus Reid Institute found that across Albertans overall, 60% would vote “no” (Alberta stays) and 35% would vote “yes” (begin the process).

However, when Albertans are instead asked a direct hypothetical — should Alberta leave Canada or stay? — support for remaining in Canada rises from 60% to 67%, while the “leave/yes” side falls from 35% to 30%, the survey found.

Carney told reporters Monday the federal government is reviewing Smith’s question to see if it complies with a Canadian law requiring clarity in referendum questions, adding that he will actively campaign against any move to separate.

“Canadians take care of each other,” he said. “It’s not perfect. We need to continue to work together, we are making progress. We’re Canadian, we’ll come together.”

Smith on Monday fired back at Carney’s remarks.

“This is a decision for Albertans — not Ottawa — and Albertans’ frustrations have been fueled by the last 10 years of disastrous policies from Ottawa under his predecessor, Justin Trudeau,” she said in a statement issued to the CBC.

“I would also remind all Canadians that we should not dismiss the legitimate grievances of Albertans. Instead, we should focus on addressing these issues, restoring hope in Canada and demonstrating that our country can work and is working,” she added.