Mate this is the kind of thing that makes you go a bit cross-eyed down a rabbit hole at 2am. I had a quick look at some of the archived flight radar data after seeing this mentioned on another forum and there's definitely something off around the timing. Could be a technical glitch, could be something being routed around that area for reasons that aren't exactly advertised publicly.
Anyone in Shropshire reading this don't worry I'm not saying black helicopters, just that the timing of radar gaps and "accidents" seems to come up a surprising amount when you dig into these things. Has anyone actually pulled the raw ADS-B data from that night rather than just screenshotting the app? That would be the thing to actually look at here rather than third hand screenshots.