Didn't see it myself but I'm curious - was this visible from the Salisbury area at all or strictly US-based? I ask because I've been spending a lot of time outdoors lately doing ley line surveys around the plain and I've noticed some odd aerial activity over the past fortnight that I couldn't explain. Nothing triangular that I clocked but definite light anomalies around dusk.
For those who did see it, was it completely silent? That's always the thing I try to nail down first. Conventional aircraft you can usually hear eventually, even at distance. The ones that proper stump me are the silent ones.
Also what direction was it moving, if at all? There was a similar sounding report from somewhere in the Southwest US back in 2019 I think, might be worth comparing notes if anyone can dig that thread up.