I’m no expert, and only posted it for a laugh. But while we’re at it…..
How do you know it was only visible locally?
How come there is a passenger plan flying from right to left that isn’t leaving a contrail(what ever that is?)
How come there’s a distinct flash or flare at the top of the vapour trail? As its sunset then surely this would be the wrong angle for a reflection from an aircraft.
I don’t really care TBH
IE6 ? At work ? do you work for the public sector perchance? Surfing the web on work time during these times of austerity and savings. Tut tut.