Yes Three rakes of DEMU of 7 cars each will do a better job in this section as it will reduce fuel, time savings on rake reversal n acceleration is also better. I had suggested to SWR this an year ago but SWR doesn't seem to be interested.
If a DEMU is introduced then following services can be made possible:-
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Rake 1:-
VSG - QLM Passenger: VSG Dep 07:35 hrs
QLM - VSG Passenger : QLM Dep : 10:00 hrs
VSG - QLM Passenger : VSG Dep: 13:10 hrs
QLM - VSG Passenger: QLM Dep : 15:20 hrs
VSG - QLM Passenger: VSG Dep: 17:40 hrs
QLM - VSG Passenger: QLM Dep: 19:45 hrs
(Will go for Primary Maintenance and run as Rake 3 next day)
Rake 2:
QLM - VSG Passenger : QLM Dep : 06:30 hrs
VSG - QLM Passenger : VSG Dep: 09:30 hrs
QLM - VSG Passenger: QLM Dep : 12:20 hrs
VSG - KAWR Passenger: VSG Dep: 15:30 hrs
KAWR - VSG Passenger: KAWR Dep: 18:15 hrs
(Will Run as Rake 1 next day)
Rake 3:
(Will depart Post Primary Maintenance at VSG)
VSG - QLM Passenger : VSG Dep: 11:45 hrs
QLM - VSG Passenger: QLM Dep : 17:10 hrs
VSG - QLM Passenger: VSG Dep: 19:30 hrs
(Will Run as Rake 2 next day)