So there is this Welshman who phoned the Police. Here is the transcript (from the BBC story but from the Police)

Control Room: "South Wales Police, what's your emergency?"
Caller: "It's not really. I just need to inform you that across the mountain there's a bright stationary object."
Control room: "Right."
Caller: "If you've got a couple of minutes perhaps you could find out what it is? It's been there at least half an hour and it's still there."
Caller: "It's in the air."
Control: "I will send someone up there now to check it out."
Caller: "OK."

Control then spoke to the Officer they had sent out to find out what it was...

Control: "Alpha Zulu 20, this object in the sky, did anyone have a look at it?"
Officer: "Yes, it's the moon. Over."

Yes, he mistook the moon for a UFO! There is the actual call on the BBC site also if you want to listen!