Thanks, Ms OWL. Your expertise with cockpit detailing inspired me to spend more time with the Spitfire's office this time.
Mikey: Thanks, and, yes, it's Airfix--1/72 no less. It takes a nice picture! I think they released it about two years ago, just in time for the 70th anniversary of the BoB--at least, the first kit I bought had a sticker on the box that mentioned this. Since the company was obtained by Hornby, they've released some new toolings that are really pretty good--although I still have a fondness for some of the old stuff.
Jack: thank you. I've admired the various Spits you've submitted to the Forum. As for the red patch, I have no idea. At that point on the fuselage moulding, there is an engraved square with a slight depressed dimple. I can't say I've seen such a marking in either photos or profiles, and pondered on whether to use it or not--but there it was on the decal sheet, so now there it is on the model.
I have twelve more Spitfires stockpiled--10 more of these; one of Airfix's recent Mk I/IIa; and one Tamiya, which I haven't even opened since, to me, Airfix is "the precious."
I appreciate the comments.