There will be no public inquiry into the London bombings of 7th July 2005.

http://news.bbc.co.uk/1/hi/uk/4526604.stm
http://news.bbc.co.uk/1/hi/uk/4527104.stm
http://news.bbc.co.uk/1/hi/uk_politics/4527320.stm
http://www.timesonline.co.uk/article/0,,2-1929374,00.html.

So instead we're going to have a "narrative" supplied by the government. We've already had that. The parallel with the way an inquiry into 9/11 was at first refused is almost embarrassing ("it would be a distraction" says Charles Clarke). Of course when it did occur, the 9/11 inquiry deliberately failed to do its purported job, and reiterated the "narrative" which had already been supplied.

See also the article by Michael Meacher which I quoted and linked to here:
http://disruptive.org.uk/2005/09/10/london_bombs_19.html.

It is quite clear that there are at least some reasons why the Government does not want a proper investigation.