Sadly the Dept. for Transport have restricted the flight deck access to those members of the operating crew (obviously
). CAA Pilot inspectors and those who have an operational need to be there such as training captains. flight test engineers etc. They also allow DFO's to allow ATC personnel on duty for familiarisation flights. There is a relaxation for certain duty personnel to request the jump seat when there are no empty seats in the cabin.
The Air Training Corps cadets. fear of flying folk and other well meaning people I am afraid are not allowed in as a direct result of 9/11 and the countermeasures subsequently introduced.
HWB