G-DOCF does not have ADS-B so its position is determined by FR24 using MLAT, which can be out of whack by a few km.
Combined with FR24's aggressive new route-updating algorithm ( which dispenses with human common sense ) this results in all sorts of nonsense.
Did you know that several TNT Stansted-rostered freighter routes actually commence from Biggin Hill? Of course they don't, but FR24 sees them low near Biggin and puts 2 + 2 together...