Peter Brierley, whose son died in Iraq in 2003, was one of several relatives critical of ministers in a preliminary hearing of the Iraq war inquiry.

He said: "If someone has done something wrong they should pay."

At an Iraq memorial service last week he told Mr Blair he would not shake his hand "because it had blood on it".

Speaking at an inquiry session on Friday, Mr Brierley, 59, of Batley, West Yorkshire said: "Members of the government that are proved to be involved in a decision to go to war should face a court charge of crimes against humanity and genocide.