To be honest, I think that newspaper article is one of the most accurate and well researched articles I have seen.
I have no knowledge but the permit could have bee just renewed, or the flight could have been for a permit renewal.
Agreed. But surely it'd have to be registered in the first place before any flight can take place? According to G-INFO the site was updated at 20:55 yesterday, and so if the aircraft was registered yesterday I think that it would show up when searching today?