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W̶r̶e̶x̶h̶a̶m̶ ̶C̶e̶n̶t̶r̶a̶l̶
EDIT: Sorry, Paul, I'll do my research better next time. Actually, I'm only visiting India, so I'm not acquainted with Indian Railways at all :).
For London Underground enthusiasts, there's the ancient LUSigSim, but it hasn't received updates since 2004. Still, there are two simulations: Epping and Acton Town, so it's worth taking a look. Be warned that the detail of simulation is nowhere near as good as Simsig, though!
Sure, that looks like the LT1973 unrefurbished that was on BRT before it closed. I've uploaded it for you here. If you were looking for the LT1973 refurbished by David Astarita, I've uploaded it here.