Hi Slaterat,
>Every single Hurricane built had the fire proof bulkhead between the fuel tank and the cockpit.
Hm, according to Stephen Bungay's "The Most Dangerous Enemy", that was not the case. Not only does he list details on the protection, he also quotes higher loss ratios for Hurricanes when it. His book is fairly recent, and on first reading it, I haven't spotted any errors that would shake my confidence in his research.
He might be wrong anyway, of course. However, his explanation matches the anecdotal evidence of flaming fuel pouring into the cockpit after hits (often enough, inflicted from behind - anything passing to the left and right of the back armour could hit the instrument panel and the fuel tanks).
>The wing tanks were made self sealing in early 1940 too. The reserve tank was not made self sealing until Sept 1940.(due to BoB experiance)
Well, so it seems Bungay is correct at least about the reserve tank.
>The Mk IIa,b recieved additonal armour in front of the glycol header tank, an extra plate extending the rear protection downwards and a thicker head plate.
Thanks for the details!

Don't get me wrong, I too believe that the Hurricane was a tough aircraft and probably would have withstood A6M attacks as well as the F4F, but in the interest of historical accuracy I felt obliged to point out the dangerous vulnerability of the nose tank arrangement.
Regards,
Henning (HoHun)