Thanks chaps. I made use of the Mike Blank Colour Harmony book for the leather jacket.
The base was Vallejo Black +Saddle Brown + Prussian Blue. First highlight was with a touch more Saddle brown to the base, then progressively adding more flesh. Shading was done with Black + Prussian Blue. For the really deep shadows such as the seams, I used Andrea black ink. Finally to help it all blend together, I added a couple of very thin washes of Black + Deep Rose Madder (Matisse Artist acrylic).