I reckon there's some depot transfer. SBS 1705 U, formerly SLBP
SP, is now on 284.
17th June 2004:
SBS 0042 E on 232 (AM 155), replacing SBS 0112 L
SBS 0103 M on 232, (AM 410) replacing SBS 0494 J
SBS 0133 B on 157 (bram SP)
SBS 0248 D on 145 (AM 155)
SBS 0355 C on 142 (AM 145), replacing SBS 0442 J
SBS 0494 J on 238 (bram 232), replacing SBS 3665 M
SBS 0499 X on 157 (bram 8 )
SBS 0677 Z on 284 (BB SBS 170)
SBS 0806 T on 163 (HG 156)
SBS 0871 D on 285 (BB SBST 170)
SBS 9434 Z on 31 (BN 21)