London Olympics Opening Ceremony: UFO, Blimp Or Drone?

Numerous people have emailed me this story today, so  I thought I'd run it by our readers to decide. Some assume the UFO seen over the London Olympics Opening Ceremony, was the Goodyear Blimp, however enhanced footage in this first video does raise some eyebrows. Please leave your comments and feedback, also if you have further footage please share the youtube link.
Enhanced footage:

News cast: