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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 22/10/2026 13:02 Additional GT 22/10/2026 23:00 23/10/2026 23:00 22/10/2026 00:00:00 22/10/2026 13:02:00 HUMR-1 22/10/2026 00:00:00 23:00 23/10/2026 00:00:00 23:00 395 80
Details 22/10/2026 16:44 Additional GT 22/10/2026 16:41 24/10/2026 23:59 22/10/2026 00:00:00 22/10/2026 16:44:00 SUTB-1 22/10/2026 00:00:00 16:41 24/10/2026 00:00:00 23:59 832 45
Details 22/10/2026 17:20 Additional GT 22/10/2026 23:00 23/10/2026 07:00 22/10/2026 00:00:00 22/10/2026 17:20:00 SEAB-1 22/10/2026 00:00:00 23:00 23/10/2026 00:00:00 07:00 400 55
Details 22/10/2026 23:24 Additional GT 22/10/2026 23:14 23/10/2026 23:00 22/10/2026 00:00:00 22/10/2026 23:24:00 ROCK-1 22/10/2026 00:00:00 23:14 23/10/2026 00:00:00 23:00 394 59
Details 23/10/2026 06:45 Additional GT 23/10/2026 06:30 23/10/2026 08:00 23/10/2026 00:00:00 23/10/2026 06:45:00 SEAB-1 23/10/2026 00:00:00 06:30 23/10/2026 00:00:00 08:00 400 55
Details 23/10/2026 14:06 Additional GT 23/10/2026 14:02 25/10/2026 23:59 23/10/2026 00:00:00 23/10/2026 14:06:00 SUTB-1 23/10/2026 00:00:00 14:02 25/10/2026 00:00:00 23:59 832 42
Details 23/10/2026 17:16 Additional GT 23/10/2026 23:00 24/10/2026 23:00 23/10/2026 00:00:00 23/10/2026 17:16:00 ROCK-1 23/10/2026 00:00:00 23:00 24/10/2026 00:00:00 23:00 394 59
Details 23/10/2026 17:45 Additional GT 23/10/2026 23:00 24/10/2026 08:00 23/10/2026 00:00:00 23/10/2026 17:45:00 SEAB-1 23/10/2026 00:00:00 23:00 24/10/2026 00:00:00 08:00 400 55
Details 24/10/2026 07:56 Additional GT 23/10/2026 23:00 24/10/2026 09:00 24/10/2026 00:00:00 24/10/2026 07:56:00 SEAB-1 23/10/2026 00:00:00 23:00 24/10/2026 00:00:00 09:00 400 55
Details 24/10/2026 15:39 Additional GT 24/10/2026 23:00 25/10/2026 23:00 24/10/2026 00:00:00 24/10/2026 15:39:00 ROCK-1 24/10/2026 00:00:00 23:00 25/10/2026 00:00:00 23:00 394 59
Details 24/10/2026 15:40 Additional GT 24/10/2026 15:01 25/10/2026 23:59 24/10/2026 00:00:00 24/10/2026 15:40:00 SUTB-1 24/10/2026 00:00:00 15:01 25/10/2026 00:00:00 23:59 832 45
Details 25/10/2026 11:50 Additional GT 25/10/2026 11:33 27/10/2026 23:59 25/10/2026 00:00:00 25/10/2026 11:50:00 SUTB-1 25/10/2026 00:00:00 11:33 27/10/2026 00:00:00 23:59 432 45
Details 25/10/2026 14:33 Additional GT 25/10/2026 23:00 26/10/2026 23:00 25/10/2026 00:00:00 25/10/2026 14:33:00 ROCK-1 25/10/2026 00:00:00 23:00 26/10/2026 00:00:00 23:00 394 59
Details 26/10/2026 12:16 Additional GT 26/10/2026 12:00 26/10/2026 23:00 26/10/2026 00:00:00 26/10/2026 12:16:00 HUMR-1 26/10/2026 00:00:00 12:00 26/10/2026 00:00:00 23:00 395 80
Details 26/10/2026 14:08 Additional GT 26/10/2026 23:00 27/10/2026 23:00 26/10/2026 00:00:00 26/10/2026 14:08:00 ROCK-1 26/10/2026 00:00:00 23:00 27/10/2026 00:00:00 23:00 390 59
Details 26/10/2026 18:00 Additional GT 26/10/2026 23:00 27/10/2026 07:00 26/10/2026 00:00:00 26/10/2026 18:00:00 SEAB-1 26/10/2026 00:00:00 23:00 27/10/2026 00:00:00 07:00 400 55
Details 27/10/2026 23:16 Additional GT 26/10/2026 23:12 28/10/2026 23:59 27/10/2026 00:00:00 27/10/2026 23:16:00 SUTB-1 26/10/2026 00:00:00 23:12 28/10/2026 00:00:00 23:59 442 45
Details 27/10/2026 13:36 Additional GT 27/10/2026 23:00 28/10/2026 23:00 27/10/2026 00:00:00 27/10/2026 13:36:00 ROCK-1 27/10/2026 00:00:00 23:00 28/10/2026 00:00:00 23:00 406 59
Details 27/10/2026 13:47 Additional GT 27/10/2026 14:00 27/10/2026 23:00 27/10/2026 00:00:00 27/10/2026 13:47:00 SPLN-1 27/10/2026 00:00:00 14:00 27/10/2026 00:00:00 23:00 420 55
Details 28/10/2026 20:04 Additional GT 27/10/2026 20:01 29/10/2026 23:59 28/10/2026 00:00:00 28/10/2026 20:04:00 SUTB-1 27/10/2026 00:00:00 20:01 29/10/2026 00:00:00 23:59 443 45
Details 28/10/2026 15:10 Additional GT 28/10/2026 14:30 29/10/2026 23:00 28/10/2026 00:00:00 28/10/2026 15:10:00 ROCK-1 28/10/2026 00:00:00 14:30 29/10/2026 00:00:00 23:00 394 59
Details 28/10/2026 16:55 Additional GT 28/10/2026 23:00 29/10/2026 07:00 28/10/2026 00:00:00 28/10/2026 16:55:00 SEAB-1 28/10/2026 00:00:00 23:00 29/10/2026 00:00:00 07:00 400 55
Details 28/10/2026 17:30 Active Power Reduction below Submitted SEL 29/10/2026 00:00 29/10/2026 23:59 28/10/2026 00:00:00 28/10/2026 17:30:00 PEHE-1 29/10/2026 00:00:00 00:00 29/10/2026 00:00:00 23:59 253 30
Details 28/10/2026 17:30 Active Power Reduction below Submitted SEL 29/10/2026 00:00 29/10/2026 23:59 28/10/2026 00:00:00 28/10/2026 17:30:00 PEHE-1 29/10/2026 00:00:00 00:00 29/10/2026 00:00:00 23:59 507 30
Details 28/10/2026 19:10 Additional GT 28/10/2026 22:29 29/10/2026 06:19 28/10/2026 00:00:00 28/10/2026 19:10:00 MRWD-1 28/10/2026 00:00:00 22:29 29/10/2026 00:00:00 06:19 450 89
Details 29/10/2026 17:10 Active Power Reduction below Submitted SEL 30/10/2026 00:00 30/10/2026 23:59 29/10/2026 00:00:00 29/10/2026 17:10:00 PEHE-1 30/10/2026 00:00:00 00:00 30/10/2026 00:00:00 23:59 253 30
Details 29/10/2026 17:10 Active Power Reduction below Submitted SEL 30/10/2026 00:00 30/10/2026 23:59 29/10/2026 00:00:00 29/10/2026 17:10:00 PEHE-1 30/10/2026 00:00:00 00:00 30/10/2026 00:00:00 23:59 507 30
Details 29/10/2026 17:40 Additional GT 29/10/2026 17:30 30/10/2026 23:00 29/10/2026 00:00:00 29/10/2026 17:40:00 ROCK-1 29/10/2026 00:00:00 17:30 30/10/2026 00:00:00 23:00 394 59