The government is facing a dual attack on the Iraq war today from the Liberal Democrats and Conservatives.

Tony Blair is accused of having undermined trust in politicians and lied over the Iraq war.

Yesterday, the Mail on Sunday published a summary of what it claimed was Lord Goldsmith's 13-page assessment of the legal ramifications of the US-led invasion.

Although Labour aides dismissed the story, it prompted both main opposition leaders to renew their attacks.

Charles Kennedy demanded that ministers show how the government became involved in what he called "a dreadful error, carried out on the basis of the wrong arguments and for the wrong reasons".

Kennedy will today call for a full public inquiry into the way the decision to commit troops was taken.

The Conservatives also stepped up their attack.

Interviewed on BBC1's Breakfast with Frost, Michael Howard accused the prime minister of having lied and he urged voters to make the poll a judgment on his character.