The descent must be pretty steep for you to all that way back though ?
The descents aren't particularly steep (or at least I don't think they are!) , it's just that I find that if I don't really put my weight back, the feeling of travelling faster than the bike gets worse!
My riding is pretty much exclusively around the New Mills area so sorry for those that have offered advice but dont know the trails.
The downhill bits I've noticed this feeling on are the drop down into Rowath from Lantern pike, Linnet clough, the rocky bit towards Little Hayfield over Middle Moor and the two bridleways that drop down towards Strines station (starting here Streetmap)
I'll try my brakes in a more horizontal position and dropping my heels to see if that helps