I've cracked it!
I merged the US and German Gauges into my model to see if it was an issue with the British textures and found that it was. When I first started messing around with a VC I saved a copy of each of the texture files (b_gauges_1,2,3) as dds_3 because I was getting an error message in Gmax when I tried to export the model to CFS3. The error message went away when I did this but the gauges became corrupted.
Now that I have deleted my dds textures from the wellington folder she looks like this...

So there you have it. My fault in the end

Will