good one Graham.
Processing wise, it looks like you have clipped the left hand side of the histogram (the black point), and have lost some depth and fainter detail. There
is plenty of detail there, it just needs to be stretched further. Have you had a look at
Louie's online tutorials on processing (in Photoshop) - they are very good - nice and straightforward. There's quite a bit of blue in there as well , that you could get out by just adjusting that channel.
Keep plugging away
Cheers
Adam