This was great fun!
I could have tweaked more, but am happy with the result....
Thanks to all for the critique, encouragement and compliments, 
Very much appreciated!
Danny's email is bouncing my submission, so I have posted a pm... Fingers crossed this is ok....
Here is my final: 
Tone mapped from exr output, with minor saturation and contrast adjustments, cheers folks, good luck to all!
Jason.