North East Cambridgeshire MP Stephen Barclay joins others, including former frontbenchers and champions of the Tory right-wing such as David Davis and Liam Fox, in the group called Conservative Voice. The group is promising to campaign to promote individual aspiration, a smaller state, low taxes, a renegotiation in Britains relationship with Europe and more radical thinking on tackling social and economic challenges. Mr Davis said: Conservative Voice is the first political initiative in a very long time that provides a home for the professional and voluntary wings of the Conservative Party and who are united in their belief in popular, radical conservatism. Our aim is to encourage seriously ambitious policy development and to help improve the partys campaigning edge in really practical ways. He added that the group aimed to work alongside the Conservative leadership. However, it comes soon after Mr Davis criticised the governments economic policy. Meanwhile at the weekend speculation about a potential challenge to David Camerons leadership of the Conservatives increased. One MP, Bob Stewart, admitted he had been approached by two people in the Tory party who asked whether he would stand as a stalking horse candidate against Mr Cameron. He refused to.