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In total, 29 letters sent by Blair to Bush in the run-up to the Iraq War have been published, detailing Blair's side of key conversations between the two world leaders.
Some have been transcribed as part of the report, while others have been scanned from the original handwritten notes.
Parts of the letters have been redacted, although, according to a Times report on Tuesday, that is simply for "privacy and security reasons and not to withhold relevant content."
Chilcot's report has taken almost seven years to come to fruition, having initially been commissioned by Prime Minister Gordon Brown in 2009. One of the biggest sources of the delays to the report has been wrangling over whether or not to release Blair's letters to Bush. Under usual circumstances, the letters would be held back from public release for at least 30 years.
Take a look at some of the key extracts - along with the dates they were sent, and screengrabs from some correspondence - below.