This kit came out last year, IIRC. They reworked the Mk.V kit, I think. The vertical stab is mis-shaped but a little card stock fixes that. If you're not into the minor differences of Spitfires, and I'm NOT, it's not correct right from the box. The pros pointed all these out to me AFTER I completed the model.
For example, Airfix molded the flaps so they could be dropped. I did and found out that the flaps were NEVER left in the down position on the ground. That brace behind the headrest should not be there for a Mk.I. (But you can make a Mk.II as well. The instructions don't tell ya to remove it.) The tool in the entrance door shouldn't be there, either.
I thought it was kinda fun build, but if and when I do another, I'll start with the Tamiya kit!!
Bo Roberts