250hPa is a little higher in the atmosphere, but I suspect broadly jetstream level. Meteorology measures atmospheric height in pressure, rather than length, because that makes more sense for the models, and predictions. But it can be a little confusing!
https://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-10.71,54.21,756
earth wind map offers a 250 or a 500 hpa view, the 250 seems to match yours a little
would that be correct for the jet stream ?
just trying to see what the difference between last year and this year is