Two questions on Iraq
1) If the UK had lined up with the rest of Old Europe in opposing the war, how likely would it have been to go ahead anyway?
2) If the war had gone ahead as a unilateral US operation rather than a US/UK operation, would the outcome have been any different, for better or worse?
(worth noting that even if the answer to 1 is ‘entirely certain’ and the answer to 2 is ‘significantly worse’, I’m not claiming that’d provide sufficient moral justification for UK entry. But it’s an interesting question.)