Originally Posted by
Video Mixdown
I don't see what difference this makes. Just because this one might (he has not examined it himself) have indeed been carrying weather related sensors does not mean others are innocent. Nor does it entitled China to operate aircraft in US airspace without informing them, requesting permission and filing a flight plan. The US were right to force it down and I would expect the UK to do the same.
Weather balloons are limited to 2kg payload as per the chicago convention the first was absolutely over that. If over 2kg you are required to file flight plan for any country you reasonably expect to cross