I don’t know if anyone has seen this site:
https://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-2.29,54.01,2081
It’s a tad psychedelic but seems to be generally quite accurate. It’s showing strong winds over the UK at the moment, which I assume is the jetstream. Sometimes this shifts and the winds over the country are much slower. I went out tonight and the seeing was distinctly below average (see file ‘jetstream’).
Telescopes: One Newtonian, three Maksutov Cassegrains, seven refractors, and a large SCT.