Britain's opposition Conservative Party is calling on Parliament on Monday to back a formal inquiry into the decision to go to war in Iraq.
"We want the principle established that there must be an inquiry. It's about making sure we don't make the same mistakes again," said Liam Fox, the party's defense spokesman in Parliament.
Prime Minister Tony Blair has ruled out an inquiry so long as British troops are deployed on active duty in Iraq.
The Conservative Party strongly supported Blair's decision to back the US-led invasion.