Cheers for the heads-up. Spaceweather is supposed to email me when this happens, but the alert seems to have gone missing this time.
Unfortunately its 100% cloud cover here tonight anyway.
I've got a few pics from last Novembers show too (what a night that was!), you can see them here if interested:
http://www.webclot.com/photos/Aurora...4/FrameSet.htm