Overtaking 56653 is never possible, One of the reason why 16527 was slow downed from previous 8.30 to current 9.30 was 56653.
So called Passenger association protested this overtake saying that, they are reaching late bcoz of this overtake. Hence 16527 was slow down drastically.
Ur 16527 timetable is really good, hope SR consider it.. 16527 is the only express train which ran as SF in Kerala, but TTs made it express again.