In summary, I'm seeking to consult an expert who understands the demands of rides like the Tour Divide and 1000km+ Audax rides, and can guide my choice of saddle.
My saddle of choice over the past few years has been the Specialized Romin Pro and Romin Evo. This is a light saddle, circa 200g, and has served me well on rides up to LEL distance. However, it doesn't provide much comfort when off-road.
I have dabbled with a Brookes Cambium C15 Carved, but I don't get on with it. I've had sores even after a leisurely 200km ride.
I have looked at the Selle Royal range, but decided that trying to determine a suitable saddle to try from their range would be a bit hit and miss. So it feels like an opportune time to actually talk to an expert, and get some guidance on a suitable saddle.
So any advice on where such an expert might exist, either in London or via a phone call, would be appreciated. Or should I take an alternative approach?