In less rural northern England, it was faintly visible to me. If I hadn't been looking for the aurora specifically, I would have assumed it was a weird cloud. A

In less rural northern England, it was faintly visible to me. If I hadn't been looking for the aurora specifically, I would have assumed it was a weird cloud. After walking a bit away from street lights I could make out a south facing arc spanning the sky directly overhead which went away within a few minutes.