Thanks.
I've looked but not found!
Maybe I should take a picture and see if anyone can shed some light on the bike?
It's my only mtn bike and we're entered for the Busksoffroadsportive in May, its very road-bike geometry (a professional bike fitting of this Sunn and my Trek shows this to be 100% the case when you superimpose the two images of me seated on the 2x bikes) , butt-up and head down, not ideal for XC technical riding though as it fels quite "wrong" compared to more modern XC hardtails.