Looks like 12809/12810 Mumbai Mail and 12859/12860 Gitanjali Express are about to see significant changes within a few days, that will go into effect in July:
Booking SuspendedI suspect it will involve speed increase, possible elimination of a few stops, realignment of coaches, and an RSA between the two. RSA will allow freeing up of one full rake as the two would be able to use 7-rakes as opposed to 8-rakes with 4 each.