Funnily enough, Nik doesn't actually propose it as a way for GA and military to avoid each other.
As I read it, he is proposing it as a way for GA (rotary and fixed wing) to avoid each other - and an RAF bod has been asked to look at mil input.
Seems a damn good idea to me - but would say not much use on safety.com
Airfields like us use safety.com - saves fees to Ofcom! - and we already have a problem with pilots from here (it is alleged) not using the Strathaven airfield name when making the call, thus causing much head rotating at Bute.
So more safety.com traffic not a good idea - but a dedicated frequency (there must be lots spare now Ofcom is charging so as to make sure we all surrender little-used frequencies!) would be the answer.
Finally, I don't care who or why or what is behind the idea - if it is a good'un let's get it happening.