Thanks for looking folks, I appreciate your comments.
As Jupiter cleared the trees I took a few test AVIs and noticed Europa popping out from behind the Jovian disc.
The 2nd file is an animated GIF of the event.
Much later, I also managed to record the GRS but by this time the seeing had dropped to between 3 and 4 so the detail is somewhat washed out.
I have been very impressed with how these ZWO ASI cameras allow the user to continue capturing planetary images in poor seeing conditions.
Cheers
Dennis