I have been looking into this “UFO” case again over the weekend and now think that it wasn’t BA9171 or another aircraft descending to Cardiff Airport or St Athan airlield nearby. Moreover, I think that the object wasn’t flying, but it probably was a ground based heat source somewhere at the top of the Quantock Hills in Somerset (e.g., Wills Neck).
I started with the analysis of the Cardiff firework video (#6) ... Read even more
