shack, that type of apprentoid nouse was still around when I was at RAFC in 1968.
Following the demise of TSR2 and F-111K, a number of 'Supertechs' were being re-roled as Flt Cdts. Thinking they could spot a skive opportunity, they declared they were 'agnostic'.
"Ahh, that's a pity, you'll have to march to church with the CofE and stand outside during the service, chaps." announced the Flt Sgt.
Not to be outdone, they then said that they hadn't had much of a religious upbringing, so needed to have a serious discussion about religion. Yes, really!
Then announced that they all wanted to become Roman Catholics. The left-footer sky pilot was ecstatic and seemingly on the verge of writing to the Pope until, being wise to the ways of man, he thought "Hmmm.......all ex-apprentices. There's probably more to this!"
It seems that they'd found out that the RCs gathered in the Junior Mess foyer at 0930, wandered along to Mass, then were done and dusted by about 1030. CSFC formed up at 1000 and marched to their god-shop, but were out again by 1100. Whereas the CofE had a parade and inspection at 1030, then marched to the Church (often spotting the RCs on their way back to the Junior Mess); if we were out by 1200 we were lucky!
So the RC padre told them that the entry into Roman Catholicism would involve rather more than ticking a box on the relevant form. Their bluff called, our happy ex-apprentices admitted to their actual religion and that was the end of it. At least the RC padre saw the funny side of it though.