LHB train
Barrackpore can't handle 20 LHB coaches
only 1PF is capable of handling 22 LHB coaches
they didn't divert they skipped Barrackpore. Original Station of dep was Barrackpore, later then extended it upto Kolkata Chitpur.
That's what I wrote earlier, Entry# 5027737. Skipping Barrackpore (BP) was the point.
Switching of a train from up mainline (line no-3) to platform 1 is not possible by present barrackpore yard layout. And express trains only run through up mainline between Sealdah/kolkata-barrackpore, so it can only arrive on pf3 (14 coach) or pf1A (12 coach)
Only trains from up suburban line (line no-1) can switch to platform no-1.