RC - I don't know of a source in the UK. It's a unclassified US Navy textbook commonly available. Here's one source in the US. As I recall there's not a whole lot about VG in it but it is pretty technical. Certainly A LOT more information and detail than any pilot has the right not know.
<a href="http://www.buildersbooks.com/aerodynamics_for_naval_aviators.htm" target="_blank">http://www.buildersbooks.com/aerodynamics_for_naval_aviators.htm</a>
Another good book is "Modern Combat Aircraft Design." You can do a web search and find it.
I'm sure there must be a bunch of UK written texts on aerodynamics/VG that would be more readily available where you are.
Try going over to the military thread and see if you can dig up any F-1 TORNADO pilots. They may be able to steer you towards some RAF texts or Flight Characteristics Sections from flight manuals. As as alternative, try some universities that have Aero Engineering libraries.
Good luck.