British Conservative Party leader Mr Iain Duncan Smith has warned his party critics to "get on board or get out of our way".
He told representatives at the party's Annual Conference in Blackpool: "I say to everyone here today, you either want my mission or you want Tony Blair. There is no third way."
Mr Duncan Smith said he now had "the most radical policy agenda of any party aspiring to Government since 1979".
He accused Prime Minister Mr Tony Blair directly of lying over the death of weapons expert Dr David Kelly, saying the scientist had been used by the government "as a pawn in its battle with the BBC".
Mr Duncan Smith told representatives: "My mission is to take the Conservative Party back to government. I won't allow anything or anyone to get in my way."
He branded the current British government "double dealing, deceitful, incompetent, corrupt and lying".
He repeated pledges to introduce a "Better Schools Passport" to help parents get their children into a school of their choice and a "Patient's Passport" giving people the chance to have private treatment partially funded by the NHS.
He said that under the Tories there would be 80,000 fewer asylum seekers and 40,000 more police officers. He also promised "a fair deal for pensioners", underlining his party's promise to raise the basic state pension in line with earnings.
Mr Duncan Smith also told representatives he would lead a campaign for a referendum on the proposed EU constitutional treaty.