Halton is split down into three phases.
The first phase is around 4 weeks, you'll learn all your basic military stuff such as marching, kit prep and who/ how to salute ect. You'll learn about the RAF and towards the end of this phase you'll undertake the general service knowledge test.
Phase two is your force protection training with the regiment, again this is 4 weeks. You'll learn about weapons, how to fire, cbrn and finishes with a week long excersize
Final two weeks are testing everything you've been taught, final kit inspection fitness test ect. You'll also go away for a week long adventure training in this period.
Hope this helps, there's some brilliant videos and video diary's on YouTube to watch. Some of them are a bit dated now but gives you a general idea
Best of luck