In reply to CragRat11:
In short, no you don't need IRATA. You also don't need any RSA course. Most of the "names" that set have no relevant qualifications.
Yes, there are loads of setters but, with the rate that walls are opening up, there's always room for more.
Unfortunately for you it is cliquey but, more importantly, being able to climb highish mid grades doesn't mean you'll make a good setter.
It's bloody hard work and, at entrance level, it's not well paid.
Also, things to factor in are you'll need your own tools, insurance etc.
And probably 80% of the work now is blocs!
I don't mean to try and put you off but a life of honey it ain't!