It's not to bad although I'm being a perfectionist here because my dad has a few models of this plane hanging about. It's good although the color scheme could be a bit more camo and the engine block exhaust should be bigger and more noticeable.
My favourite plane :). You have captured some of the features very well like the exhausts and RAF symbols on the wings. I very difficult plane to build (I know because I have built one too, and it is far from perfect). I also like that its at minifig scale. The only way to improve is to keep on building outside of your prefered theme - like you have done here. Great job and good luck in the contest.
I dont mean to be well..mean..but I believe you made a good effort. The main problems i find are the cockpit location on the fuselage, the size of the propellor, the color (but Im just a perfectionist), and the size of the main wings. But I do think you made a good effort do to this. I had once tried to make the Spitfire but I didnt have an adequite amount of brown and green.