Ms Perry, the Climate Change Minister, was promoted as part of Theresa May’s chaotic reshuffle, with her current role upgraded so that she will attend Cabinet meetings.
Downing Street confirmed Ms Perry will attend Cabinet as Minister of State at the Department for Business, Energy and Industrial Strategy.
However, her presence may irk her Brexiteer colleagues in Mrs May’s new look Cabinet, after she used the Article 50 Bill debate in the Commons to say they’d been “acting like jihadis”.
Ms Perry complained about “hysterical” rhetoric surrounding Brexit, before comparing Leave backers to Islamic fundamentalists.
Speaking in February 2017, Ms Perry told MPs: “I have to say that the tone of this debate – and we have heard a little bit, although it is starting to calm down – sometimes border on the hysterical.
“I feel like sometimes I am sitting along with colleagues who are like jihadis in their support for a hard Brexit.”
Taking aim at her Tory colleagues, she added: “No Brexit is hard enough, ‘begone you evil Europeans, we never want you to dark our doors again’.
“People say: ‘Steady on, Claire’, but I am afraid I heard speeches last week exactly making that point.
“The point of this is, the more we get this our in the open, the more we are not led by some of the most hysterical tabloid newspapers out there, but actually have an open and frank conversation with each other about what we want to do, the better.”
Ms Perry will also have to work alongside Transport Secretary Chris Grayling once again, after she quit as Rail Minister in July 2016.
Friends of Ms Perry said she had quit because “she was fed up justifying how c*** our railways are – she wants the freedom to tell the truth”.
Friends added “she could not face working for another secretary of state” after Chris Grayling was appointed Transport Secretary.