At the start of the foreign secretary's evidence to the Chilcot panel, Sir Roderic Lyne, a member of the inquiry panel, said it had heard "three rather different explanations as to why we took military action against Iraq in 2003".Tony Blair emphasised the need to impose regime change on Iraq, Lyne said. But Jack Straw, the foreign secretary at the time of the war, stressed the importance of dealing with Iraq's presumed weapons of mass destruction, Lyne said.And Gordon Brown, when he gave evidence on Friday last week, said he supported the war because he thought the will of the international community had to be enforced.