The Chair of the committee (or another committee member) will speak for up to 10 minutes and then answer questions from MPs on issues relating to the statement, usually for another 10 minutes.
Select Committee statements can only be made in the Chamber on days that the Government sets aside for backbench business (and only on full days set aside for this purpose, not half days). They take place after Question Time and any urgent questions or oral statements.
You can watch a video of a Chair making a select committee statement: