Bit of a long shot but did anyone manage to get footage or even just a decent photo of it? I'm based in Wiltshire so obviously wasn't there myself, but a close friend of mine was visiting family in Scottsdale and messaged me in a panic that night saying he'd seen something huge and completely silent moving over the city. He described three white lights forming a triangle and it was low enough that he reckoned he could judge the actual size of the thing against the rooftops below it.
What I'm trying to work out is whether this matches the classic TR-3B profile or something genuinely unknown. The silence is the detail that keeps nagging at me - conventional craft that size would shake windows. Has anyone cross-referenced this with any ADS-B data from that night to rule out conventional traffic?