[Nokose]

Looked at the 07 Sep 40 from 18:00-18:55 (17:00-17:55 British). Don Caldwell lists JG 26 tangled with the 603 Sqn but at least one 603 Sqn Spitfire went down in the area of the Thames Estuary at 17:39 which is the area of JG 2's engagement. I removed RAF losses outside of that area and German claims as much as possible considering the general locations such as "London".

RAF losses:
242 Sqn Hurricane 17:00 Thames Estuary
257 Sqn Hurricane 17:30 Thames Estuary
257 Sqn Hurricane 17:30 Thames Estuary
303 Sqn Hurricane 17:00 Thames Estuary
303 Sqn Hurricane 17:00 Thames Estuary
303 Sqn Hurricane 17:00 Thames Estuary
603 Sqn Spitfire 17:39 Thames Estuary

German claims in that area:
Obfw. Erich Rudorffer 2/JG 2 Spitfire 18:30 Thames Estuary
Spitfire 18:40 ?
Spitfire 18:43 ?
Oblt. Siegfried Bethke 2/JG 2 Hurricane 18:42 eastern edge of London
Obfw. Hans Tilly 3/JG 2 Hurricane 18:50 Thames Estuary
Lt. Karl-Heinz Dudeck Stab II/JG 2 Spitfire 18:20 ?
Oblt. Hans Hahn 4/JG 2 Hurricane 18:25 Gillingham
Oblt. Helmut Wick 6/JG 2 Spitfire 18:25 ?
Obfw. Franz Willinger 8/JG 2 Spitfire 18:25 ?
Fw Kurt Goltzch 8/JG 2 Spitfire 18:26 ?
Fw Karl Ebert 8/JG 2 Spitfire ? hrs London area (Not confirmed)
Obfw Hans Klee 7/JG 2 Spitfire 18:45 Themsemüdung
Lt. Franz Beyer 8/JG 2 Hurricane 18:10 ?
Oblt. Walter Adolph 8/JG 27 Spitfire 18:25 south of Stanford

So in that area for six Hurricanes and one Spitfire there are German claims for nine Spitfires (& 0ne unconfirmed) and six Hurricanes. Far to many claims to confirm Hahn's Hurricane unless you drop the Spitfire claims which is impossible to do since everyone wanted to claim that they beat a Spitfire. So possibly a shared, escaped and always possible shot down for Hahn.