FWIW, I don't think that's a shadow in the left foreground.
Just a bare patch of turf, pretty common in the Falklands moorland.
I think the landscape in the painting is marvellous. I'm going to go out on a limb and say that's Mt Usborne in the very far right background, with the spot that the F4 had the CFIT crash, in later years, just below the cloudbase on the right edge of the painting.
Last edited by inputshaft; 7th Oct 2014 at 06:25.
Reason: Adding smarty pants guess