So thats the reason some SBC trains were shifted to BNC and later could be sent to BYPL...It was mentioned as below in recent TT changes list released by RB to Zones.
.
)12509(SBC-GHY) -- Current - SBC - 23:30 --- New BNC (BYPL) 23:40
2)12510(GHY-SBC) -- Current - SBC - 11:50 --- New BNC (BYPL) 11:40
3)12845(BBS-YPR)...
more... -- Current - YPR - 11:10 --- New BNC (BYPL) 10:50
4)12846(YPR-BBS) -- Current - YPR - 08:00 --- New BNC (BYPL) 08:20
5)18637(HTE-YPR) -- Current - YPR - 05:00 --- New BNC (BYPL) 04:30
6)18638(YPR-HTE) -- Current - YPR - 00:30 --- New BNC (BYPL) 00:15
.
Going by this in future if the BYPL is ready these may operate from there.