Liz Truss could have the fracking ban lifted within days of her Tory leadership contest win, sources say.
Ms Truss remains the overwhelming favorite to succeed Boris Johnson after the poll in the competition closed at 5pm on Friday.
The Conservative Party said nearly 20,000 members attended the hustings and a total of 2.2 million people watched a husting online.
If she succeeds, it would mean Ms Truss would step into Number 10 amid ever-growing concerns over the energy crisis and mounting calls for the government to intervene urgently to support households this winter.
And after a protracted contest in which the foreign minister repeatedly clashed with rival and former Chancellor Rishi Sunak, Ms Truss will also be under pressure to keep her campaign commitments.
According to a report in The sunMs. Truss would deliver on one of her political promises by quickly lifting the fracking ban.
The newspaper reports that lifting the effective ban on fracking could come in the first few days of a Truss administration, and under its plans it would only allow fracking with the support of local communities.
That telegraph also reports that Ms Truss is considering explaining to her new cabinet within 24 hours of taking office how she would tackle the energy crisis.
The frontrunner has so far hinted that it would offer new support to households, but has given few details on the possible form.
In her last message on Friday, she paid tribute to the party members she had met over the past few months.
She said: “It has been fantastic to meet and speak to thousands of members across the UK over the last six weeks.
“Our members make our party great and I want to thank all the volunteers who helped us make it happen.
“I believe in a brighter and brighter future for Britain. I have a bold plan that will grow our economy and deliver higher wages, safer families, and world-class public services.
“I will do this by lowering taxes, enforcing supply-side reform and cutting the red tape that holds companies back.
“If I am elected Prime Minister I will never allow anyone to belittle us and I will do everything in my power to ensure our great nation prospers.”
Mr Sunak had said he was “humiliated” by his commitment to party loyalists.
“This is a crucial election for our country and for the future of the Conservative Party as we seek an historic fifth term in government.
“We are facing great challenges, but also great opportunities. I know what it takes to get through challenging times. I did it as chancellor and I will do it again as prime minister.”
Conservative Party leader Andrew Stephenson paid tribute to the two candidates and party members at the conclusion of the Tory leadership race vote.
“During my 80-seat tour across the country, I have found that our members have a strong voice and are ready to take the fight to Labor and the Lib Dems and win that historic fifth term at the next general election.
“Whatever the outcome on Monday, I know our party is ready to unite around a new leader and address the challenges we face as the country of the future.”
That call was repeated by Tory MPs on Friday, with several prominent members of the Parliament Party urging all sides to come together once the new leader is elected.
Sajid Javid, the former health secretary who failed in his bid to be the next leader, tweeted: “Whatever the outcome, let’s unite, deliver and win.”
Penny Mordaunt, a one-time favorite in the running for the final two in the competition, also tweeted, “Let’s give our new PM every support.”
But Ms Truss also faced renewed criticism on Saturday after the Guardian published an article by a police chief who called some of her law and order policies “meaningless”.
Dyfed-Powys Police Chief Richard Lewis said that while some of their proposals could make “attractive headlines”, such ideas were “meaningless without further explanation from the hopeful Tory leadership”.
Boris Johnson’s successor, who will take over as Prime Minister the next day, will be announced on Monday.
Mr Johnson and his successor will travel to Balmoral rather than Buckingham Palace for the appointment of the new Prime Minister on Tuesday, breaking with tradition.
The Queen will receive Mr Johnson at her home in Aberdeenshire on Tuesday September 6, where he will formally hand in his resignation.
This is followed by an audience with the new Tory leader, where he or she is invited to form a government.