London, April 28 : A UFO apparently hovered over Britain's Westminster Abbey, the venue of the Prince William-Kate Middleton royal wedding, shows a video footage shot by a tourist.
The footage, which is about two-and-a half minutes long, is of a white object in the sky near Big Ben, The Sun reported.
"First we thought it was a parachute but it was way too high up," the tourist who posted it on the internet wrote.
"It changed shape but stayed there for at least 30 minutes. Then I lost sight of it."
The UFO sighting took place soon after an American predicted extra-terrestrials would come to see Wills and Kate marry Friday.
"I think it should be investigated if it's feared it could be a threat to the Royals," British UFO expert Nick Pope was quoted as saying.