The Prime Minister is set to appeal to Labour voters who feel disillusioned with Corbyns leadership in tomorrows keynote speech at the Tory party conference in Birmingham.
Labour has been campaigning with the phrase “For the many, not the few” since the 2017 snap election.
Mrs May is expected to tell delegates she “passionately believes” Britains best days lie ahead after Brexit.
She will say: "Millions of people who have never supported our party in the past are appalled by what Jeremy Corbyn has done to Labour…
COPYCAT: Mrs May parodies Mr Corbyn's most famous line in her latest speech
“A party not for the few, not even for the many, but for everyone who is willing to work hard and do their best.”
"They want to support a party that is decent, moderate and patriotic. One that puts the national interest first. Delivers on the issues they care about. And is comfortable with modern Britain in all its diversity…
"We must show everyone in this country that we are that party….
"A party not for the few, not even for the many, but for everyone who is willing to work hard and do their best."
Mrs May earlier suffered harsh criticism from ex-Foreign Secretary Boris Johnson, who told a packed conference hall she had to “chuck Chequers” – her post-Brexit blueprint.
Johnson claimed her plan for leaving the EU amounted to a “ridiculous slipping away of our self-belief” instead of the “freedom” that was promised.
After arriving to a standing ovation in Birmingham, Johnson said his main fear is that Britain has “lost confidence in its basic beliefs in freedom” and accepted “foreign rule” by the European Union.
He said exiting the EU on “Chequers terms” would be “politically humiliating” for Britain, leaving the nation “unable to make our own laws”.
The PM is expected to make major concessions in new proposals to the EU that could delay Brexit for years and restrict Britains ability to strike trade deals.
She is planning to keep Britain tied to European customs rules on goods beyond the scheduled leaving date of March 2019, according to the Times.
Under these plans her government would not have complete freedom to agree trade deals with nations across the world for several years after the transition period ends in December 2020, the paper claims.
An EU summit on October 18 to 19 has been billed as the "moment of truth" when it will become clear whether it is possible for the two sides to do a deal.