The new group is intended to unite grassroots Tory activists and more senior politicians who;
support the Conservative agenda of individual aspiration, small government, low taxes, a broad rather than deep relationship with Europe, more direct accountability to voters and radical thinking on providing public services and tackling the country's social and economic challenges.
As well as Mr Davis and Dr Fox, other MPs named as backers are Conor Burns, Robert Halfon, Priti Patel and Dominic Raab.
Two Tory big beasts are launching a group campaigning for "radical" policies, amid pressure on David Cameron's leadership.
David Davis and Liam Fox will unveil Conservative Voice, urging the party to show "serious ambition".
Although organisers insist the group will work alongside the leadership, the move comes with the Prime Minister struggling to placate Conservative traditionalists from two former front-benchers who ran against him for the party leadership.