I found a bit of a dodgy way of laying out UV's after skinning. By making a duplicate of the originl head, and laying out the UV's on that, you can transfer its attributes back to the main head. Hopefully this will be a good enough fix for now.
I am a video game artist at Dovetail games, working on Train Simulator 2014, 2015 and an unannounced title.
I also graduated from the CG Arts course at UCA in 2010 with a First Class.