Hahaha nice photo and nice gun. Five birds, I need to hunt with you. I have NOTHING against British guns, I'll own one eventually. I think a drinkable Bordeaux (or CA blend such as Isoceles) pairs very well with grouse, but others would argue that a white would work, and others say a Burgundy...but that's a slope as slippery as Parker shotguns. I love a great Burgundy value if you can get a $30 Mercurey just slightly chilled a bit and it's basically heaven with a grouse or pheasant. I tend to roast and pan baste, or spatchcocking is great. Depends on my mood. BTW you should join as a member here, you seem normal. Join and we'll ruin you and then you won't be normal.
https://parkerguns.org/forums/showthread.php?t=34686