It seems odd that 167S151(1241Y) doesn't do 167 like other split
shifts but it still is perm 167.
Looking at the demands of 969/599, It should be obvious why
bendies are deployed, which is why they chose 1241Y to perm that
969/599 duty, while the PM part gets taken by random buses (I don't
think 167 needs bendies does it? Unless there is a 'super high'
demand for a high capacity bus, if not I don't think 1241Y will
come out and do 167)
Quite odd but the main problem lies with the 969/599 duty more
than the 167 part, If the demand in 969/599 drops then they will
use a normal bus (this way it will make more sense, no confusion
here and there why it should use a bendy for the earlier portion,
leaving the PM slot empty.)
What you said is quite true. But then again, why couldn't they
just picked another parent service for Sv 599 then? If Sv 599's
demand requires a bendy, IMO i think it's just better if they
picked a parent svc which already has plenty of Bendies. Instead of
sticking 1241Y into Sv 167..