A protester outside the venue where former British Prime Minister Tony Blair speaks to an audience during his speaking tour, Eden Park, Auckland. Photo / File
The relatives of some of the 179 Britons killed in the Iraq war plan to boycott the long-awaited Chilcot inquiry report into the conflict as they fear it will be a "whitewash".
The two million-word report, six years in the making, will be unveiled by Sir John Chilcot on Thursday (NZT).
Tony Blair, prime minister when Britain went to war, has said he will not make any comment until the report is made public.
The International Criminal Court (ICC) has indicated the former Labour leader will not be liable for prosecution, reiterating its conclusion 10 years ago that the decision to go to war is not within its jurisdiction.
The court said it will look at the report's findings before deciding whether there is a "reasonable basis" to begin an investigation.
Speaking to Sky News on Sunday Mr Blair said: "I have taken the view, I think rightly or wrongly, we should wait for the report to be published and then I will express myself and I'm not getting into either the politics or the detail of it until I've actually seen it."
A number of MPs are expected to try to use an ancient law to try to impeach the former prime minister once the findings are published.
Former Scottish First Minister Alex Salmond said there "has to be a judicial or political reckoning" for Blair's role in the Iraq conflict while shadow chancellor John McDonnell said the "processes" of how Britain ended up at war must be examined "so we never ever get into this tragic, tragic mess again with such loss of life".