not really , it all depends on sbst ,
Theory : the bb vo2x were transfered to SL to take over the
positions of the mk2s on the industrial svcs once they are gone ,
slowly . phase by phase
, e.g 7240D & 7241B are on 192 almost everyday .
so for svcs like 154 . most likely a Vo2x , Vo3x or Lo3x will take
its position .
237K is on 335 for a few weeks , 3749E on 79 for a month . < not
confirmed perm >
this means that 79 & 335 will be FAC svc unless sbst renew
roadtax for mk2s . but the question is this , why didnt sbst renew
the roadtax for 1833H & 1804S ? , why keep them on lay up
status ?
well this is just a theory . 
