The problem is, Brindavan gets delayed en route almost all days a week and on an avg arrives at BNC with a minimum of 15 mins delay. It trails plenty of trains till SBC and sometimes waits for KK to cross after KJM. Also note avg arrival time of KK at SBC is around 14.50 and Brindavan's arrival was scheduled accordingly. Lets see if SWR can reduce the slack by 10 mins. But 12640's slack needs to be reduced by 10-15 mins.