Came across this today. gives all the ref nos of films at Imperial war museum and there are lots of "calling Blighty" films of service men and women from Burma and India to different areas in the Uk- I think someone asked about them a while ago. None online though. Colonial Film Database | colonialfilm
Just to add had a look at this and here is a list of the Burma films, but as I said in another post how do you access the film that is described as they sound really intresting!! Production Companies | colonialfilm