I was thinking of going down the private lessons route, what do you think of that?
By and large, I'd not recommend it. I think you'll get much more out of your sessions by being part of a larger group, regularly swopping partners, learning to adapt to other body styles, and so-on.
1:1 works for, say, people training fine technique for competitions and suchlike, but for most of us a bigger group is the better learning environment.
In any case, you are always technically 1:1 with your training partner of the session for most of the time.