I presume he's going for Airman rather than Officer (because that's the process you've outlined).
The 2 day stage at Halton is called Pre-Recruitment Training Course (PRTC). It's fairly docile to be honest, it's a bit of a taster of military life before actually committing to the service. This includes NCOs barking at you (I say you, I mean the plural sense, not the 'spitting-in-your-face' barking), and military barracks. There's no real training involved, just general advise about RTS (Recruit Training).
You're issued your boots which you will use during 'real' training. You're issued them then so you have a chance to break them in before training starts. It's cos they're leather so need to mould to your foot. Make sure he does this, if you've got a dog make him talk it for a walk while wearing them (him, not the dog).
I'm confused, I thought Day 2 of PRTC was the fitness test, but you say your son has only done his? Meh, maybe things have changed...Anyway, he'll get advice about mental strength during training, diet and nutrition, foot-care (vital) and how to conduct yourself on an RAF base and in accommodation. He'll also get to meet other people who will be on his RTS.
The final interview comes AFTER the 2 days, and is really just a informal chat about how it went. He must read and sign a few forms, and formally confirm a few details, but that's it really. It's nothing like the initial interview.
I hope this helps, if he wants any help in the near future, then whack it on here because I check on here every so often (I'm an RAF officer, if you hadn't worked out
).
Pass on my best wishes to your son, he is about to join one of the best organisations in the world. Oh and one last bit of advice.
Mummyflood's son, when someone tells you to do something during training, follow these steps:
DO IT
DO IT NOW
DO IT QUICKLY
DO IT PROPERLY
Follow that and training will sail by :)