But this train can return to its base. If it leaves SBC at 14:50, it can arrive GUV at 23:55.
I have to run this train in this slot because there are no platforms vacant in GUV after 05:50. The only time a platform is available is between 21:10 and 05:50.
And most trains take 10 minutes for reversal. Even if it takes 20 minutes in reality, it can make up due to the slack time provided between TCR and PGT.