Originally Posted by
LHR/MEL/Europe FF
I would recommend booking the highest class of travel from the outset to secure the seat... 1AC if possible (if that is in fact available on the train). For the few dollars extra you get a world of difference.
IF seats is available. There are far fewer 1AC coaches than 2AC / 3AC / 2nd Sleeper, and if you absolutely need to take that train, you get seats wherever they are available. Or wait for 8 AM india time exactly 2 days before your journey and grab (nonrefundable) tix from the "tatkal" (instant / last minute) quota as soon as it becomes available.