U.K. Prime Minister Theresa May denied the government’s plan to exit the European Union is “muddled,” saying she’ll unveil details of her strategy in the coming weeks.

May said no plan for Brexit was drawn up by her predecessor David Cameron, and she needed to assess the situation and work out the correct way to act once Article 50 of the Lisbon Treaty is invoked by the end of March, starting two years of divorce talks.

“There hadn’t been any plans made for Brexit so it was important for us to take some time to look at the issues, look at the complexity of the issues,” May said Sunday in an interview with Sky News. “Our thinking on this isn’t muddled,” she said, “I will be setting out some more details in coming weeks as we look ahead to triggering Article 50.”

May defended herself against an allegation by Ivan Rogers, Britain’s envoy to the EU who quit last week, that her government lacks an effective strategy for leaving the bloc. She said a deal will have to include control over Britain’s borders, which other EU leaders have said will be a bar for giving the U.K. access to Europe’s single market in goods and services.

“I hope you will continue to challenge ill-founded arguments and muddled thinking and that you will never be afraid to speak the truth to those in power,” Rogers wrote in a resignation note to colleagues. “The government will only achieve the best for the country if it harnesses the best experience we have.”

Asked about the tradeoff between single-market membership and free movement of people, which will be at the heart of the negotiations, May said Sunday it will be about “getting the right relationship, not about keeping bits of membership.”

“We are leaving. We are coming out. We are not going to be a member of the EU any longer, so the question is what is the right relationship for the U.K. to have with the European Union when we are outside,” she said. “We will be able to have control of our borders, control of our laws, but we still want the best possible deal for U.K. companies to be able to trade in and within the EU and European companies to operate and trade in the U.K.”

Steve Baker, who leads a group of about 60 Euroskeptic lawmakers from May’s Conservative Party, said the premier’s comments were “great news for the U.K.”

“This is welcome clarification of a sensible position by the prime minister,” Baker said in an email. “The best outcome for the U.K. is an ambitious trade deal plus control of our laws, trade policy and borders.”

While Baker’s support will be welcomed by May, it will fuel allegations from opposition parties that the prime minister’s attempts to balance the competing factions in her party mean she is not acting in the interests of the rest of the country.

“My worry is that Theresa May, instead of behaving like a prime minister should, is putting the leadership of her own deeply divided party ahead of her responsibilites as prime minister,” Scottish First Minister Nicola Sturgeon told the BBC. May is “trying to appease the increasingly right wing Brexiteers in her own party instead of prioritizing what would be a sensible solution for the U.K. to stay in the single market for example,” Sturgeon said. “The interests of the country in these next few months have to come to the fore.”

Education Secretary Justine Greening offered a glimpse of the intense work being done by the prime minister as she seeks to refine the strategy for leaving the 28-nation bloc. May, who has a growing reputation among ministers and civil servants for her eagerness to be involved in policy detail, has personally overseen discussions on the issues, Greening said.

“She’s worked through methodically with cabinet colleagues the many, many areas we have to have clear thinking in place on,” Greening said in an interview with BBC TV. “The prime minister will take her own decision about how much she wants to disclose.”

May pledged to use the Brexit vote to drive a change in the relationship between people and the government, saying the state should be willing to step in to solve “burning injustices.” Writing in the Sunday Telegraph of her vision for a “shared society,” she said there is “more to life than individualism and self-interest” and rejected the idea that government should get out of the way.

“When the British people voted in the referendum last June, they did not simply vote to withdraw from the European Union; they voted to change the way our country works – and the people for whom it works – forever,” she wrote. “It was a quiet revolution by those who feel the system has been stacked against them for too long – and an instruction to this Government to seize the opportunity of building a stronger, fairer Britain that works for everyone, not just a privileged few.”