Rally days won't teach you much about circuit driving. I've done one in a Group N Impreza which was masses of fun, especially the handbrake turns, but it's a very different discipline. I'm not saying that none of the skills can be transferred over (certainly balancing the car is a great skill to acquire), but if you want to do track days I'd be looking at something circuit-specific.
I can't recommend anything up north for lack of knowledge, but what I can say is that Andy Walsh at www.carlimits.com is the best instructor I've ever had. You'll learn more there in a single day than a week elsewhere, and he's a top guy as well. It's a trek from you, but grab a cheap hotel the night before locally and it'll be worth every penny. Get a few other Zeds on the day too and you've a little mini-meet, with a competition at the end on the course he lays out. Tuition isn't cheap, but this is WELL worth it.
Trackday tuition isn't really the way to go here, they'll teach you about the lines on a track and a basic understanding of braking/apex/acceleration points, but that doesn't sound like what you're after initially. A must do as a second step after, though!