Tony Blair has admitted for the first time that he ignored the pleas of his aides and ministers to deter President Bush from waging war on Iraq because he believed that America was doing the right thing. And he has acknowledged that he turned down a last-ditch offer from Mr Bush to pull Britain out of the conflict.

He has also revealed that he wishes he had published the full reports from the Joint Intelligence Committee (JIC) instead of the infamous September dossier about Saddam Hussein’s alleged weapons of mass destruction that so damaged him, and was almost certainly one of the factors that contributed to him leaving office sooner than he wanted.

In frank remarks in a BBC documentary, Mr Blair confirmed openly the belief of many of his closest supporters that he never used his position as America’s strongest ally to try to force Mr Bush down the diplomatic rather than the military route.