Thanks very much Richard, I had a fantastic time.
Went back up again tonight since the weather is expected to turn cloudy after this so thought I would have one last go for the ZL. Turned out to be a good decision, it was the best view I've had yet, spotted it early at 19.40 UT and watched it until 20.30 UT. It was remarkable, incredible shape, and 45 degrees tall, even noted subtle blue-green colours within at one stage. Again, it was brighter than the Milky Way in Cygnus. This might be my last session with it until the next dark period, but who knows. Four nights in a row is a personal record for me. I'm glad I made one last effort to enjoy it all by myself. Here are two images, the last is 7 min's long at ISO400.

