Labour MP Jeremy Corbyn, a leading candidate to head the Labour party, has said former Labour Prime Minister Tony Blair should be tried for war crimes over the 2003 Iraq war if evidence shows he broke international law. At the time when Britain joined a US-led invasion of Iraq, despite widespread public opposition, Corbyn organised mass protests against the war. Blair has previously said he had no regrets over the invasion, saying Saddam Hussein was a threat who had to be disarmed or removed. Corbyn said the long-running inquiry into the Iraq invasion needed to tackle unanswered questions about how Blair decided to get involved in the war. Lengthy delays to the publication of the report have frustrated MPs, including David Cameron who on Tuesday urged its independent head, John Chilcot, to set out a timetable for the publication of his findings.