If you contact Course Admin at Blandford they will give you a contact number for the guy who runs the courses. I rang him and he was very helpful. Course is open to all ranks. He will give you the info you need.
Thanks, I was surprised to see these courses, was it originally a RAF course? How do courses get funded? Would my attendance be billed to my unit who wouldn't benefit from me attending the courses (civ work/MOD would do though)