Battle of Britain was fought with Spit Is and very few IIs. If you are asking for Spit I skins then it's going to make sense cause they didn't use the gray/green outside of OTUs when they were no longer front line combat or ASR Spit IIs.
We only have 2 Spit I skins. Both are B of B skins, 54 and 74 Squadrons. If you are 'sentimental' about the B of B then fly the Spit I in the brown green. Or fly the Spit V in brown/green and pretend it's a 92 Squadron Spitfire Ib.
You have to understand the scale on which the Spit V fought which is covered wonderfully by the skinners, and Kev in particular.
We've got Malta based, Italy based USAAF stuff, North Africa, pre-August 41 ETO and post 41 ETO when they changed to gray/green. RAAF PTO etc.
We could still use a Russia based Spit V and a camo RAAF bird, and potentially a good North Africa RAF bird just to even things out.
In all honesty, considering it's use, it would make more sense to ask for more gray/green Spit Vs cause they saw more service in those colors. As it is, I think we have a wonderful selection of skins for the V and adding another brown/green makes less sense then the 3 others I mentioned if we are to get more V skins.
I know Spits are your passion at the moment, but you've been changing on the fly from B17s, to 109s now to Spit Vs. I'm guessing you'll find another passion long before we get more skins.
Not meant as a shot btw, just an observation as your passion for whichever plane is clear, but seems to be relatively short lived. It wasn't that long ago that I coulda swore you were 303rd BG B17s for life and that died fast