Norfolk MP Liz Truss called for tax cuts to "make Britain grow again" as she rallied a crowd of Tory members at the Conservative party conference.
The South West Norfolk MP - who had a brief 49 days as prime minister - gave a speech at a fringe event at the Manchester conference.
Ms Truss, who has been re-selected to fight for her Norfolk seat at the next general election, urged members to “unleash their inner conservative” after calling for chancellor Jeremy Hunt to cut corporation tax to 19pc, at least, and to slash government spending.
She told a packed room at the Midland Hotel: "Let’s stop taxing and banning things. Let’s instead build things and make things.
"Let’s be prepared to make conservative arguments again, even if it’s unpopular, even if it’s difficult. I want everybody in this room to unleash their inner conservative.
“And finally, my friends, let’s make Britain grow again."
She said 500,000 homes a year needed to be built - suggesting environmental protections could be torn up to encourage building - and called for ministers to permit fracking.
She was joined at the Great British Growth Rally by allies and former cabinet colleagues Dame Priti Patel, Sir Jacob Rees-Mogg and Ranil Jayawardena.
There were cheers from the hundreds who managed to make it into her speech, as they were reminded she was elected by party activists, in contrast to prime minister Rishi Sunak’s victory among MPs.
Former UKIP leader Nigel Farage, was also in the audience. He told the Press Association: “She’s absolutely right on the big stuff – I’m slightly sceptical on the housing.
“This is a battle for ideas, it’s a rejection of her own party’s policies, but it’s really a battle for what the party becomes after it loses the next election.”