To be brutally honest I would just fly it using a GPS, and not worry about VORs too much as there aren't many about and when flying below CAS one is often out of reception range.
I always try to route on VORs and NDBs but often it doesn't make sense, and then I route via airway intersections because they are in the GPS database and that makes it easy. Never use user waypoints
(unless totally unavoidable and in 9 years of flying I have had to only do it once, for a little airfield in Spain).
Stay talking to London Information. They have radar (but are not allowed to indicate such) and will give you a squawk, and can see you, so if you get into major trouble you can tell them, etc.