Thats the open secret. SWR wants to run all its West/North bound trains via UBL. Thats why they are pushing SBC-UBL-PUNE/SBC-UBL-GDG-SUR line. On the other hand, if they double YNK-GTL line, they will get DEFL to North as well as West India along with shortest route. Forget about railfans, even common man can smell rat here!!