Not to be picky but there would not have been the yellow leading edge ID stripe on the dark earth, dark green camo. That was added when they changed to the Dark Green/Dark Sea Gray upper camo. And I'm not sure where the RAF would have operated P40Es in that camo. Most were in the North Africa and the Med where they had the desert camo of the dark earth and tan.
There were some early Tomahawks flown in that camo in England, but I don't believe P40Es from everything I can find.
Keep in mind I couldn't do the great work you are doing on the skins, so I'm not criticizing, just trying to help out

Dan/Slack