Once Ananthapuri becomes SF, Ananthapuri should leave MS at 17:00 PM before Kanyakumari SF and arrive QLN at 08:00 AM (speeded up) and leave QLN as QLN MS mail around 12:00 PM and arrive MS at 03:30 AM (QLN MS MAIL) and go for PM
And MS QLN Mail should leave MS at 22:00 PM (its old timing) to arrive QLN at 12:30 PM at QLN and leave as Ananthapuri SF around 16:30 PM and arrive MS at 07:00 AM (speeded up)
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The PM maintenance should be at MS MAS Div for both these trains and Sethu SF should still have RSA with this train but PM should be at MS . In that case all three will reach MS daily and also will have PM daily which will help in cleanliness .