Only SirJohnChilcot, who retired as permanent under-secretary of the Northern Ireland office on the day the commission was announced, is not on record with a view.
SirJohnChilcot has said the report into his inquiry, which featured 18 months of public hearings between 2009 and early 2011, will not be published before the middle of this year at the earliest.
SirJohnChilcot, 70, is a former permanent under-secretary of state at the Northern Ireland Office and has been chairman since 2001 of the Police Foundation and sat on the Butler Inquiry into the intelligence on Iraq's weapons of mass destruction.