Silver, Reflective Object Glides Across Daytime Sky in England

• When: July 9th, 2017
• Where: Leeds, West Yorkshire, England
• What: Silver sphere traveling very fast
  

A video showing a bright white orb or sphere gliding through the daytime sky, and seeming to reflect  the sunlight, has surfaced on YouTube and has even been picked by local news outlets:

The witness suggests on-camera that they could be viewing a weather balloon, but otherwise don't know what they are looking at. What do you think? Is this a balloon, drone,  or something else fairly mundane? Or could this be a extraterrestrial satellite or craft?

I have yet to really authenticate this report,  but I will be following up for more information, so stay tuned!

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