thinks this will happen:
DM3500 > BBDEP > retrofitted to JB mark III style > svc
170e [future]
some JB B10M mark III > BNDEP/HGDEP
BBDEP may be replacing those Volvo MK3 with full fleet MK4
DM3500s on JB services in near future. For now they are
progressively transferring Volvo MK4 DM3500s from all over the
depots to BBDEP first in order to meet the required number of
fleets. After which SBST will make modifications and register those
DM3500s with the JB side before services 160 and 170 gets them.
That's what I heard.
If this really happens, wonder how those Volvo MK3s gets
scattered around after redeployments takes place.