Come on, everyone who knows anything knows all the troops the UK had were shipped to the UK, then shipped back out to india. What you're asking is ahistorical.
and no, I'm not being serious obviously.
India trained a large amount of troops and produced plenty of weaponry during this period on it's territory. It's strange to consider that all UK military would end up from london. Though on the other hand, being allowed to deploy wherever (on cores) is a bit exploitable too, UK building it's entire military in singapore or hongkong might be a bit weird
True, but then make some events (against payment of equipment etc etc) that make all uk,Indian,Singapore armies possible to arrise at there orriginal location. Btw: thats also a solotion for the Ai to get troops where they should be.... Or am I thinking to much in hoi3 Logic now ;-)