Of the two Aircrew Lt Cdrs I worked with when mobilised, one was Ops Offr for an Apache Sqn and the other was doing a stint as Ops Offr at JHF (A), so they do sometimes get trusted with a reasonable size of a train set.
I can tell from that statement you have never been a part of JHF(A), or if you have, it was as part of the problem in the HQ, not the solution in the various cockpits.
JHF(A) is renowned for it's inability to organise a piss up in a brewery, especially by the crews of all shades operating under it's bloated banner.
It is not a 'train set' as you describe it, but a staff college for the doubtful.