Our local college used to run an Army Preparation course. (It might still be running, I guess.)
It was set at a very low level and those who passed were then allowed into Basic Training.
Lord help us, we had one former pupil who - it turns out - thought that he actually was in the army. (It didn't seem strange to him that he was going home to his mum every night.)
He managed to complete the course somehow, but didn't make it through Basic Training. My understanding is that he was told to leave very early on.
I've just Googled. The last mention that I can find of that course is 2017:
"Army Preparation at xxx College is a full-time course which focuses on Core Skills, fitness and transferable skills. As well as fitness work, you’ll study map reading and land navigation, circuit and resistance training, and a range of sports activities which include climbing, hill walking, mountain biking and orienteering."
I suspect that the army had to inform the college that the course wasn't fit for purpose.