BLS has total 4 platforms.
PF 2 and 3 are on mainline.
PF 2 is used by CTC-BBS bound trains and PF 3 is used by KGP bound trains.
PF 1 and 4 are on looplines which are generally used by MEMUs, Passenger trains and freight trains.
Kindly...
more... check platform of all the trains halting at BLS bound towards JER-KGP-HWH.