The parents of a north-east soldier killed in Iraq are part of a group of families threatening legal action if the report into the 2003 invasion is not published by the end of the year.
Diane and Walter Douglas are among 29 who have issued an ultimatum to the inquiry’s chairman Sir John Chilcot over the “unacceptable” delay in releasing his findings.
Much of the anger is focused on the ongoing Maxwellisation process, which gives individuals facing possible criticism in the report the opportunity to respond.
Lawyers for the families have written to Sir John calling for him to set a deadline for witnesses to do so.
If he does not promise the report will be published before next year, they have said they will take their case to the High Court.
Mrs Douglas, 64, whose son Lance Corporal Allan Douglas was killed in 2006, said bereaved relatives needed closure. The Aberdeen resident also called for former prime minister Tony Blair to be tried for war crimes.
“It has gone on too long,” she said. “Tony Blair is still walking about as if he owns the country.
“It’s just not fair. The delay is totally unacceptable.
“We are still looking for these weapons of mass destruction, they have never been found. And look at Iraq today, it’s back to square one.
“I don’t think the whole truth will ever come out and it makes me feel sick.
“I’m so hurt by what Tony Blair did to these hundreds of kids. He should be tried for war crimes.”
The delay has been a growing source of frustration for David Cameron, who has demanded a timetable for publication must be set out “pretty soon”, but Whitehall sources do not expect one before parliament returns in September.
Sir John insisted last month that his inquiry, expected to cost taxpayers £10million, was making “significant progress”, although he could not yet give a date for releasing the findings.
It was established by then prime minister Gordon Brown in 2009 and took public evidence from its last witness in 2011.