MPN, however I can remember a startling piece of staff work out of 11Gp. At the time the F4 sqns at Leuchars with the Mk1 Phantoms had developed an entirely different code system from the southern Mk2 Sqns for practice intercepts.
No doubt there had been moves the years to get the sqns to agree common cause. However a wg cdr from Leuchars, posted to the staff, implemented the change wef - no warning, nothing. The Leuchars guys got airborne unaware of the change
OTOH, more recently, Air Cdre Support at Strike brought in New training facilities; there was no take up by the bomber sqns as they were not under command.