Danny, I don't know whether you've been watching the Dangerous Railways series on Channel 5 with Chris Tarrant, but in case you haven't this last episode should be of interest. He rides the Konkan line south of Bombay down the west coast to Goa. This is the missing line that you couldn't take, on account it wasn't built until the 90's. Despite Tarrant's "Grumpy Old Man" style (at least he manages without clutching an ancient copy of Bradshaw throughout!), the technical achievements of what were then 20 year old engineers are impressive. The British decided that this route, open to the Monsoons from the Arabian Sea and the raging rivers out of the Western Ghat, was just too difficult to build and operate. The Indians begged to differ...
Episode 3: India | Chris Tarrant: Extreme Railways | Channel 5
Ref the two officers with darker uniforms, they probably are Australian as neither of them have folded their arms exactly as briefed, unlike nearly everyone else!