Has heard that ERS - TVC Vanchinad & TVC - NDLS Kerala have crew link between ERS & TVC. Similarly, NDLS - TVC Kerala Express & TVC - ERS Vanchinad are operated by the same crew, belonging to ERS depot. Don't know if this crew link still exists.
12626 runs from NDLS to ERS with a single WAP4 link, has a loco change + reversal at ERS and runs with a different WAP4 link between ERS-TVC. The arrangement was like this ( not sure if the same is continuing now) : 12626 runs with one WAP4 between NDLS-ERS and uses a different WAP4 between ERS-TVC. The WAP4 that hauls 12626 till ERS, takes 12625 from ERS to ED and from ED to NDLS, a fresh WAP4 hauls 12625.
So finally what happened to the passengers of S-5 coach. Did they have enough berths to accommodate the passengers of this coach in other coaches ? I am sure the other coach passengers would NOT have agreed for so much time to adjust with passengers & that too for a long journey.