Interesting, maybe it depends on when you were looking? Also central York and we popped outside just after half eleven and the aurora was very visible to the naked eye, not in full multicolour but very clearly not a cloud, quite thick and radiating out from a centre in the sky almost all the way down to the horizon. We have a reasonably dark place we can look from near us (and where we got some photos on a smartphone camera that show a sky full of vivid purples and greens) but I could see it clearly enough from right outside our house even with the bright led streetlights all around.

After 20 minutes it faded from view almost entirely and we went inside. I have no idea if it came back or what it was like beforehand, maybe we got very lucky or maybe it came and went through the night?