Sonar

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Following a full service review, launched at the Commercial Balancing Services Group, the BM Start-Up generic terms have been changed to reflect greater transparency, resulting in SONAR publishing additional information, including the BMU ids.

Together with the publication of BM Start Up instructions we are also publishing Advance Synchronisation instructions, to distinguish whether the instruction is BM Start Up or Advance Synchronisation, the details will include BPA information for BM Start Up and these fields will be blank if the instruction is an Advance Synchronisation (as cost is not incurred).

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Agree Time / Instruction Time Category Start Time / Earliest Sync Time End Time / Cancel Time Updated
Details 07/09/2026 08:56 Additional GT 07/09/2026 10:30 07/09/2026 14:30 07/09/2026 00:00:00 07/09/2026 08:56:00 RYHPS 07/09/2026 00:00:00 10:30 07/09/2026 00:00:00 14:30 210 60
Details 07/09/2026 13:27 Additional GT 07/09/2026 13:30 07/09/2026 18:00 07/09/2026 00:00:00 07/09/2026 13:27:00 RYHPS 07/09/2026 00:00:00 13:30 07/09/2026 00:00:00 18:00 210 60
Details 07/09/2026 13:34 Additional GT 07/09/2026 22:00 08/09/2026 22:00 07/09/2026 00:00:00 07/09/2026 13:34:00 HUMR-1 07/09/2026 00:00:00 22:00 08/09/2026 00:00:00 22:00 400 89
Details 07/09/2026 20:41 Additional GT 07/09/2026 20:41 09/09/2026 23:59 07/09/2026 00:00:00 07/09/2026 20:41:00 SUTB-1 07/09/2026 00:00:00 20:41 09/09/2026 00:00:00 23:59 440 45
Details 08/09/2026 21:10 Additional GT 08/09/2026 21:10 10/09/2026 23:59 08/09/2026 00:00:00 08/09/2026 21:10:00 SUTB-1 08/09/2026 00:00:00 21:10 10/09/2026 00:00:00 23:59 432 45
Details 09/09/2026 07:48 Active Power Reduction below Submitted SEL 09/09/2026 08:30 09/09/2026 23:59 09/09/2026 00:00:00 09/09/2026 07:48:00 PEHE-1 09/09/2026 00:00:00 08:30 09/09/2026 00:00:00 23:59 507 30
Details 09/09/2026 07:49 Active Power Reduction below Submitted SEL 09/09/2026 08:30 09/09/2026 23:59 09/09/2026 00:00:00 09/09/2026 07:49:00 PEHE-1 09/09/2026 00:00:00 08:30 09/09/2026 00:00:00 23:59 253 30
Details 09/09/2026 08:46 Additional GT 08/09/2026 22:00 09/09/2026 22:00 09/09/2026 00:00:00 09/09/2026 08:46:00 HUMR-1 08/09/2026 00:00:00 22:00 09/09/2026 00:00:00 22:00 400 89
Details 09/09/2026 17:12 Additional GT 09/09/2026 22:26 10/09/2026 11:00 09/09/2026 00:00:00 09/09/2026 17:12:00 MRWD-1 09/09/2026 00:00:00 22:26 10/09/2026 00:00:00 11:00 260 89
Details 09/09/2026 21:02 Additional GT 09/09/2026 21:02 11/09/2026 23:59 09/09/2026 00:00:00 09/09/2026 21:02:00 SUTB-1 09/09/2026 00:00:00 21:02 11/09/2026 00:00:00 23:59 432 45
Details 09/09/2026 21:39 Additional GT 10/09/2026 04:30 10/09/2026 22:00 09/09/2026 00:00:00 09/09/2026 21:39:00 HUMR-1 10/09/2026 00:00:00 04:30 10/09/2026 00:00:00 22:00 400 89
Details 10/09/2026 17:28 Additional GT 10/09/2026 22:26 11/09/2026 10:00 10/09/2026 00:00:00 10/09/2026 17:28:00 MRWD-1 10/09/2026 00:00:00 22:26 11/09/2026 00:00:00 10:00 260 89
Details 10/09/2026 20:53 Additional GT 10/09/2026 20:53 12/09/2026 23:59 10/09/2026 00:00:00 10/09/2026 20:53:00 SUTB-1 10/09/2026 00:00:00 20:53 12/09/2026 00:00:00 23:59 42 45
Details 10/09/2026 21:27 Additional GT 11/09/2026 03:00 11/09/2026 22:00 10/09/2026 00:00:00 10/09/2026 21:27:00 HUMR-1 11/09/2026 00:00:00 03:00 11/09/2026 00:00:00 22:00 400 89
Details 11/09/2026 13:10 Additional GT 11/09/2026 21:00 11/09/2026 23:00 11/09/2026 00:00:00 11/09/2026 13:10:00 HUMR-1 11/09/2026 00:00:00 21:00 11/09/2026 00:00:00 23:00 400 89
Details 12/09/2026 22:00 Active Power Reduction below Submitted SEL 12/09/2026 21:00 13/09/2026 06:45 12/09/2026 00:00:00 12/09/2026 22:00:00 MRWD-1 12/09/2026 00:00:00 21:00 13/09/2026 00:00:00 06:45 210 30 12/09/2026 00:00:00 18:21