Assuming PM remains at varanasi. Then the rake going JAT will be returning the same day so it's impossible for it to go Katra in current TT. But if JAT is PM, then a new rake will run daily as 12238 so no TT issues. BTW, like one day 12237 reached JAT by 10.20 am. Similary some more speed up can allow it to reach JAT by 10 and leave by 10.10 for katra so, katra extension is possible this was with PM @ BSB.