Nothing ties in here that justifies further serious consideration:
No original negative has surfaced..
No probable Harrier was around at the time and place of the alleged sighting,
The claimed object moved in a way that no high speed American "Black Project"could reasonably be expected to do.
The anonymous 'witnesses" have absented themselves from being interviewed .
So pretty much no provenance to justify any further attempts at serious analysis
Nick Pope,of course, was a fairly junior desk clerk in the MoD Secretariat and never in the particular DIS environment where incoming imagery of interest was technically analysed by qualified engineering and imagery interpretion professionals. See
https://ico.org.uk/media/action-weve...80931-x2x9.pdf