Yay my first of the season, totally unexpected so early in the evening; walked out at 11pm and was blown away by the display low to the north, I didn't get this shot until about an hour later; hasty shot cropped from a wide-angle lens, they faded away after this, gone by 1am.
Was it cloudy everywhere else in the world that night or what?! Southern England had a big show and lots of people were getting great images. I also heard USA had a mega NLC in the last day or two with it visible as far south as Las Vegas ... A bit quiet on this forum now eh ... I'm a member of this FB group for landscape astrophotos, mainly British but is international, good place for NLC alerts and lots of pics of the above NLC on here: www.facebook.com/groups/1243890635696056/
Sonic, Where I am just south of London the display on the 21st / 22nd was confined to a bright band low on the horizon. It only just reached up to Capella and on the morning of 22nd it was below Zeta Per which was around 8 degrees altitude (see image). I have looked at the EUMetSat overnight Cloud Top Height (CTH) and fog (low cloud) images and can see no obvious reason why the display did not develop here. There is low cloud over east anglia & higher cloud over Norway but I don't think either would prevent NLC being illuminated. The sky was clear so I was seeing above the low cloud over East Anglia.
The image shows the maximum extent - as the sun got higher it faded into the dawn without developing at higher altitudes.
Just beware the image times in the exif data are wrong - they are not the time the image was taken - they are either the modification date or something else - NLC do not occour at the times given in the images !!