A large number of secret documents detailing government blunders over Iraq remain buried in Whitehall, a Foreign Office whistle-blower said yesterday as he called for a full public inquiry into the war.

Carne Ross, formerly Britain's top Iraq specialist at the United Nations, protested that the Butler and Hutton inquiries had not fully examined the events leading to military action in 2003. He told MPs, who are investigating leaks and whistle-blowing by civil servants, that the intelligence available to the Foreign Office made it "very clear" that Saddam Hussein did not possess weapons of mass destruction. But he protested that he was not given a proper chance to raise his worries with ministers in the build-up to war.

Mr Ross resigned in 2004 as a civil servant after giving anonymous evidence to the Butler inquiry and is now an independent diplomat.