Having just done the Scottish fighter thing, I can see a major limitation with it. Without Germany attacking both SZ110 and SZ111 you can’t scramble and therefore the Luftwaffe live on to assist with Barbarossa. If you scramble G1, you can normally kill several Luftwaffe which reduces Germany ability project power to both Normandy and Moscow.
Is that a strategy, Germany ignoring one of the UK fleets? Does that create new issues?
I presume as UK I’d be free not to do a usual 6inf/1fighter buy
SZ111 is usually the Allied fleet to ignore if Germany only has sufficient resources to attack one on G1. These ships can be killed on G2 but usually at a cost of a couple of subs, perhaps a plane or two, and potentially losing the ability to simultaneously attack a big stack in the Med. I would purchase a sub + 2 bombers on G1 if I knew that SZ111 was being ignored.
As the UK, I would strongly consider purchasing a factory in Egypt on UK1. Building 2 inf + 1 fighter in London is often sufficient to make Germany reconsider Sea Lion if they need to spend more heavily on controlling the Atlantic on G2. That Egyptian factory is invaluable for controlling Africa, the Middle East, and the Med. Convoy raiding Italy by turn 3 or 4 makes for a big shift in income.
The net result of that single Scotland fighter-bid is quite significant.