No expert, however as far as I know, FRA at MME is mostly weekday stuff.
MME FRA do mostly EW training/radar jamming etc..
Not strictly an ex mil club, but there are a good percentage due to the nature of the work.
As far as I know, its the FRA from eastbourne that play wit the Navy during thursday wars... MME's gang play games with the hawks of 100sqn.
Regarding time to command, Ts & C's... no idea, but the guys I've spoken to seem chuffed with their job.
Hope this helps.