1. The BDA is a truly dreadful device. I suspect it was invented so that SAC could score points off the USN for specifying probe and drogue as their preferred refuelling method! I've used it once - in a heavy Q-fit F4 with 8 missiles, 3 tanks and without having had any dual, let alone a briefing... It was horrible - although I did eventually teach myself how to use it when the boom-bitch stopped moving the damn thing every time I missed! And NEVER to be used with large receivers!
2. Triple point is essential in some, though probably not all, FSTA.
3. The boom would aid interoperability, but is by no means essential for the RAF.
I agree with you, Roly, regarding the numbers. Funny old thing, that! Yes, thanks to NuLabor's 'Come-as-you-are-and-bring-a-bottle' wars, really the need is for 22-ish aircraft AT/AAR aircraft.
Which is precisely what was on offer back in about 1996....24 x A310MRTT...
