What TS said above ditto.
The only way to really find out is get on the phone to recruiting at Middle Wallop and to have an open and honest chat with them - there is no point in wasting your and their time if the answer is a closed door.
The AAC training machine is the fastest of all 3 at the moment and there are seats to be filled - this is not the case, as you know, with the other 2 services. Defence needs flexible thinking at the moment and you might be able to be part of this if you have something they want.
Good luck!
G