Flight saftey a poor second !
It is the start of something very wrong when ATC staff cant get a jumpseat trip and for them to be vectoring aircraft around the sky without the first idea of the conditions and cockpit workload is a danger to all of us and the traveling public and so a number of flight deck flights should be part of the training.
The nub of the problem is that a bunch of civil servants and MP,s are making up the rules about a subject on which they have next to no knowledge.
It is my opinion that the CAA are fighting the security people on this one but unfortunatly goverment stupidity will always win.
The security risk of ATC staff on the flight deck (almost nill ) should be balanced with the risk to all flights of part trained controlers.