There's 557 at CCK, 559 at Yishun
599 at Hougang/S'goon Nth
I mean, if there is a certain kind of partition on premium
services between SBST and SMRT, that may not be identical to the
existing partition on normal services, e.g. if SBST is allowed to
operate premium services from cck and yishun, is SMRT allowed to
operate from cck or yishun too?