Different Country and different branch of the military but a large military aviation training program graduate and later Instructor Pilot in that same system.
The US Army in the 1960's was confronted by a need to ramp up Helicopter Flight Training due to a small bit of unpleasantness in Southeast Asia.
We were pumped through in one year from initial entry beginning with Basic Infantry Training, followed by Pre-Flight Training, Primary Flight Training, Advanced Flight Training, Instrument Flight Training, and finally Tactical Training.....in one year.
Primary Flight Training was a mix of Civilian Flight Instructors and Military in a 3:1 ration (Civvie/Military), with the other phases being done by Military Flight Instructors.
Conversion training following graduation from Flight School was determined by Class Standing and all Conversion Flight Training was done by Military Flight Instructors with a few very minor exceptions.
The one corner that cut in that training was the Army in its infinite wisdom elected to do only sufficient instrument flight training to meet the requirements of what it called the "Tactical Instrument Rating"....only real difference being no ILS Approaches were taught thus no "Standard Instrument Rating" was issued.
That was based primarily on the inability to conduct those approaches due to the sheer numbers of students being pipe lined and came back to haunt the Army post Vietnam.
I later did the Standard Instrument Flying Course which was taught by all Civilian Flight Instructors....mine being former USAF before his retirement from the military.
There is no reason the RAF cannot get the job done if sufficient resources and management priority is given to the task.
Or the US Air Force for that matter....but both the RAF and the USAF have very similar problems today.....and yes even the US Army. has forgotten how to get it done.
I would suggest a proper focus on the root causes of the problems would yield some common results in all of the services.
Politics and Funding with ever constantly changing priorities being the most serious culprits.
Sort those out and with some effort to secure effective managers to oversee the entire process and the hiccups down the line would soon be fixable.
One note.....our service commitment BEGINS the day one receives those Wings and in my situation should I have failed Flight School at any point or for any reason I would have had a Two Year commitment from initial entry with the rank of Private.