The Iraq Inquiry is set to finally publish its report into the UK's involvement in the Iraq war.

Led by Sir John Chilcot, the report will examine the UK's actions in both the run-up to the conflict which began on March 20, 2003, and its role in the war itself.

Announced by Prime Minister Gordon Brown in 2009, he initially said he had been advised the Iraq Inquiry would only take a year.

The Chilcot report will be published on Wednesday, July 6.

Let's break down what we know so far about the Iraq Inquiry's findings.

The report will span 12 volumes as well as an executive summary.

Among the issues the report is expected to address are: the decision to go to war, how well-prepared British troops were and what planning there was for the aftermath of military action.

Its 2.6 million word-count puts it at over four times the length of Leo Tolstoy's magnus opus, War and Peace.

Seven years in the making, the Iraq Inquiry has seen two General Elections, two Prime Ministers, a Scottish independence referendum and an EU membership referendum come and go.

It has taken longer to complete than the six-year military engagement the report is centred on.

The final cost of the inquiry is projected to be over £10m - almost half of which official figures suggest has been spent on staffing.

In its first year, the inquiry spent £588,700 on public hearings, but these were completed in February 2011.

In the financial year 2014-15, the inquiry spent £241,300 on on office accommodation, £93,300 on IT and communications and £900 on stationery.

Purchasing a hard copy of the report will cost members of the public £767.

This fee was waived for the relatives of soldiers who had died in the conflict following a storm of controversy.

One of the reasons cited for the prolonged delays to the report's publication was the sheer volume of evidence, with Chilcot conceding in 2015 that he and his team had "underestimated" the manpower needed to sift through the 150,000 documents they received.

Among the evidence were minutes from more than 100 cabinet and cabinet committee meetings.

Not only that, but the inquiry held over 130 sessions of witness evidence and heard from over 150 witnesses, including former prime minister Tony Blair, former foreign secretary Jack Straw, former defence secretary Geoff Hoon and Blair's former head of communications, Alastair Campbell.

The last hearing was held on February 2, 2011 - 67 months ago.

Sir John Chilcot will launch the report in a speech at 11am on Wednesday morning, and it will be available to read online shortly afterwards.