Then why is Tony Blair(our primary ally) allowing Iraq arms buyers to do this?
To do what?? Do you think they are handing out free samples of enriched uranium or something?
Get a clue. If the Iraqis see weapons that will blow them up, what are they going to do about it?
None of this stuff is classified. All of it is embargoed. I'm sure Iraqis have also gone to airshows and seen B-52s or F-16s up close. BFD.
All they can do at the show is look, not buy. Even if Iraq was allowed to buy weapons from the Brits, which they are not, by the time they could take delivery on any order, the war would be over. This is nothing more than window shopping. Big deal.
Information and specifications on everything that is currently being show is available via "Google" search. Nothing being shown is a secret. It has all been available from Janes for a good long time.
None of this will be sold to Iraq legally. With enough money Iraq can buy almost anything on the black market. What part of this is not clear to you???
Stay safe; stay armed.