If you are located between latitudes 50 degrees and 65 degrees North or South of the Equator then you will be seen by the presence of ‘Noctilucent Clouds’, Neo-Clouds, or NLC’s.
At above 200,000 feet or over 30 miles, Neo-Clouds (Noctilucent clouds or NLCs) are extremely rare very high clouds seen in the night sky, usually on clear, summer nights.
The northern season from the UK for Neo-Clouds are about to begin – you could monitor to check the “daily daisies†for preliminary sightings from NASA’s AIM spacecraft;
spaceweather.com – Noctilucent Clouds (NLC).