As far as I'm aware the first induction you can just turn up to (that's what I did last summer) and they run every Saturday after the track skills session. It's the accreditations you need to book through Rider HQ.
The website just says to get there at 12:30 to sign on and sort a bike out.
Hmm, ok. So what's happening this saturday then? No induction session at all or worth turning up to see what's going on?