Some more thoughts on UK2: Assuming Yunnan has survived and the two UK inf were moved there and also survived but two inf from India have left on a transport, you can get 9 UK inf into Shan State. Not enough to hold it against the Japanese. But throw in 3AAA, art, a Mech Inf purchased on UK1, ANZAC inf + 3 ftrs, USSR 2Mec + 2Tank plus planes and 2 US planes (with J1 DOW) from Hawaii and you have a serious force that the Japanese can’t easily dislodge. You need to abandon Yunnan as the Chinese though. Take it back China3 probably.
Calculator: Japan 6inf + 3art + 11fighters + 8tb + 2sb vs 10 inf + 3Mec + 2Tank + 1art + 2TB + 6ftr + 3aaa = avg 11 lost Japanese planes.
Assuming a blocker in SZ37 stopping bombardment.
Japanese can defend FIC with their air force mostly assuming they took it J1 so you might not be able to take that down but you can at least tie down Japan and reinforce Malaya. And annoy by taking Shan State.
I guess this move works much better against a J2 DOW than a J1. Either way I still think an inactive UK Pac sucks. What does turtling achieve? Nothing really.