Eonite - I added a 2nd cloud layer and gave teh top one a smaller scale and a few other adjustments and made that layer higher in the altitude than the lower one.  Fiddled around till it sat on the first one.

Bryster - yes, I've seen a few recently hanging over Cannock Chase which is forest and heathland near where we live.  Always annoyed when I don't have my camera with me !!

Gill