Families of servicemen killed in Iraq are meeting members of the inquiry into the conflict.
The meeting is the first in a series across Britain which will take place this month.
The meeting in London will be followed by a second in the city for veterans.
Sir John Chilcot, chairman of the Iraq Inquiry, said: "We said right from the start that one of the inquiry's first priorities was to hear from the families of those who died during the conflict and others from the UK who were seriously affected, including those who served in Iraq.
"It's an important part of our preparations - we want to know what they think the inquiry's priorities should be and hear about any concerns they may have.
"I'm encouraged that so many families have expressed a desire to be involved in the inquiry process, either through these meetings or by setting out their thoughts in writing. The Committee looks forward to hearing their views."
Meetings will be held in Manchester on Friday, in Edinburgh on October 21, in Bristol on October 23 and in Belfast on October 28.
The inquiry team wrote to all of the British families who lost loved ones during the Iraq conflict and around 50 said they would like to take part in the meetings.
The committee also contacted organisations representing former and current military personnel and issued an open invitation to people who served in Iraq to take part in separate discussions.
Since the Iraq Inquiry's public launch the team has been examining thousands of documents from UK government departments in preparation for the public evidence hearings which are due to start in late autumn.
