There always used to be a ready supply of standby guys on the AOC who could operate Capital in the event of illness or holiday - don't know whether this is still the case ? Interesting work for a few weeks then the fatigue of the long hours set in & it lost it's appeal ( 6am start , down by 9 then instruct all day & back up with the eye at 16:30 for a couple of hours ) . However , I believe that it's no longer line instructors flying it now .
Oh , and some of the " presenters " have quite interesting personalities at that time of the morning as well - maybe thats why these two left ?