Hello, I got 3 and half hours on NGC 6744 on Friday at ISO 800, 400 sec subs. There seems to be some small galaxies in the background to the left and also ? that blob above it.
M77 was a quickie as it was quite low for me with trees/houses in the way.
Camera =60Da, EXIF ranged from 19 down to 15'c even though ambient got down to 4'c.
Nice images Graham, especially the detail in NGC 6744! There appears to be a colour gradient in this one (magenta at top to green at bottom) - maybe you could try processing it out while the clouds are stopping you doing more imaging.