Walking back from the observatory I notice a white/green arc low to the north. I thought maybe aurora but unlikely!
By the time I was home it had to be and there were occasional rays growing upwards. A quick 'phone around was in order. Colin H, Mark C, Paul B and Mike C.
I dragged out Sue at ~22:15, 'I cannot see anything'. Disappears back into the warmth.
About 5 minutes later big bright shafts of green, white, pink and red grew rapidly up past Polaris in the NNW. A big bright pulsating, shimmering curtain drowned out any light pollution.
A deep red pervaded the sky further west and then up towards the zenith.
In 20 minutes it was over. Not bad from the back garden!