Eventually got around to riding this route yesterday. Weather was stunning, we managed to pick a route from Mickeys dinner taking in several byways to the start of your marked route. Rode it to the end then turned round and rode the route back to our starting point. 30+ miles and we saw 2 walkers and 1 cyclist on the whole route! And this is 20 mins from central London!
I think some of the wooded sections would be tricky in the winter but yesterday you could have done the whole route on dual sport tyres. So thanks for sharing Nick.

Only downside was a nail in my back tyre on the M20. I managed to change the tube (after much struggling) but I just couldn't re seat the bead with my pump. Even the AA man had to release the air out and lubricate the tyre before it would seat. Any tips from the experts??