Thought I'd recommend the Oval Motorcycle Centre, as I couldn't find any reference to it elsewhere on the forum. The OMC is a great resource if you've not got a fully kitted out home workshop.
I'm a new rider, with next to no experience of bike maintenance; I dropped in for their monthly motorcycle maintenance beginners course last night, taught by Matt Liddy, it was great and I'll be booking in next week to get my bike up on a stand and change out my rear brake pads.
http://www.ovalmotor...k/web/index.php
"London's only motorcycle self service, maintenance and repair centre for all motorcyclists regardless of machine size, type or mechanical experience. All in a clean and dry environment complete with tools, benches and paddock stands, enabling you to perform any of the above tasks. Come and visit us, have a look and a chat, all questions answered and remember, with us there is no such thing as a silly or stupid question if you don't know then you don't know, after all we didn't know until we were taught."