The Tories face "annihilation" if they do not find the right leader to replace Theresa May , a top minister has warned.
Liz Truss, Chief Secretary to the Treasury, warned the rise of Jeremy Corbyn's Labour and Nigel Farage's Brexit Party could wipe out her party in the polls.
She spoke hours before a new poll suggested the Brexit Party could win more votes in a general election than the Conservative Party.
Ms Truss told the Mail on Sunday: "The Conservative Party needs to wake up.
"Just doing more of what we have been doing for the past nine years is not going to win over modern Britain.
"We need to be bold, otherwise we will be annihilated by the tsunami of Corbyn and Farage."
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Ms Truss is one of Next Tory leader odds: Candidates and hopefuls to replace Theresa May when Mrs May steps down.
The Prime Minister has sparked a leadership battle in all but name after confirming she will leave once her Brexit deal is passed.
Right-wing Brexiteer Esther McVey has confirmed she will stand while others are mulling their options including Boris Johnson, Amber Rudd, David Gauke, Matt Hancock, Sajid Javid, Jeremy Hunt and Andrea Leadsom.
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Ms Truss outlined her own vision for the country, risking the fury of Tory grassroots activists by announcing a million new homes should be built on the Green Belt.
She said: "We need to build a million homes on the London Green Belt near railway stations, and around other growing cities, specifically to allow the under 40s to be able to own their homes.
"We should allow villages to expand by four or five houses a year without having to go through the planning system, so people can afford to live locally."
