Very cool! Pre-patch I did the same in a Spit. I set fire to a bunch of fuel tanks near Dover just to watch the pyrotechnics and flew through the flames to see what would happen. Thought I got through unscathed, but then noticed that my port wing was on fire. As I climbed out the fire spread back along the wing, threatening to immolate the whole aircraft. Going into coarse pitch I had enough room for a power dive which extinguished the flames, with no apparent damage upon examination in external view. I later landed normally with no problems.
Unlike yourself, I didn't have the presence of mind to grab some screenshots or even get some video footage.
. Gorgeous shot, BTW!