Hi Nigel,
Welcome to the forum.
My view is the same as I recommend to my pupils!
Ride on you own for 4-6months before starting any Advanced Training.
Find your way, get used to your bike etc....
However saying that I don't just get the pupil through the test and leave them to it!
I do offer a
Post Practical Test Pass + course aimed at the period post test but before advanced.
This in my opinion is a time that newbie riders are at their most vunerable!
I always recommend my post test pupils interested in advanced training to visit
http://www.advancedmotorcycletraining.com