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Last update at: 2024-10-18T15:30:00+01:00

**Please note that the last update time shown is rounded to the next market interval of 30 minutes

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Gas Storage: Historical Outages (https://www.ssehl.co.uk/HALO/)
  

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Date of event: From date:
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Event Status Type Of Unavailability Type of Event
Affected Asset or Unit Affected Asset or Unit EIC Code
Affected Asset or Unit Message ID Event Status Type Of Unavailability Type Of Event Publication Date/Time Event Start Event Stop Unit of Measurement Unavailable Capacity Available Capacity Technical Capacity Reason Of Unavailability Remarks Balancing Zone Affected Asset or Unit EIC Code Market Participant Market Participant Code
1 2 3 4 5 >
Atwick ATW_000000000000000000949_005 Active Unplanned Storage unavailability 2024-10-16T15:34:28+01:00 2024-08-02T15:44:00+01:00 2025-01-30T18:00:00+00:00 TWh 0.3908 3.0778447 3.4686447 Failure
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000905_002 Active Planned Withdrawal unavailability 2024-10-16T09:02:25+01:00 2024-04-09T08:50:00+01:00 2025-06-26T05:00:00+01:00 GWh/d 40 90 130 Planned Outage
Phase 6 Reduction
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000973_001 Active Planned Withdrawal unavailability 2024-10-11T09:36:54+01:00 2025-07-16T18:00:00+01:00 2025-07-29T18:00:00+01:00 GWh/d 100 30 130 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000747_002 Active Planned Injection unavailability 2024-10-11T09:35:20+01:00 2025-06-26T05:00:00+01:00 2025-07-16T18:00:00+01:00 GWh/d 30 0 30 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000746_002 Active Planned Withdrawal unavailability 2024-10-11T09:34:06+01:00 2025-06-26T05:00:00+01:00 2025-07-16T18:00:00+01:00 GWh/d 130 0 130 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000972_001 Active Planned Withdrawal unavailability 2024-10-11T09:32:32+01:00 2025-06-18T05:00:00+01:00 2025-06-26T05:00:00+01:00 GWh/d 50 80 130 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000971_001 Active Planned Withdrawal unavailability 2024-10-11T09:30:56+01:00 2025-05-31T05:00:00+01:00 2025-06-09T18:00:00+01:00 GWh/d 50 80 130 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000970_001 Active Planned Withdrawal unavailability 2024-10-09T10:12:00+01:00 2024-11-02T07:00:00+00:00 2024-11-02T19:00:00+00:00 GWh/d 130 0 130 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000969_001 Active Planned Injection unavailability 2024-10-09T10:11:21+01:00 2024-11-02T07:00:00+00:00 2024-11-02T19:00:00+00:00 GWh/d 30 0 30 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000968_001 Active Planned Storage unavailability 2024-10-04T11:25:08+01:00 2025-08-01T05:00:00+01:00 2025-09-24T18:00:00+01:00 TWh 0.442 2.6385477 3.0805477 Planned Outage
A7 maintenance
21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000967_001 Active Planned Storage unavailability 2024-10-04T11:16:21+01:00 2025-07-01T05:00:00+01:00 2025-07-14T18:00:00+01:00 TWh 0.333 2.7475477 3.0805477 Planned Outage
A5 maintenance
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000912_003 Active Planned Storage unavailability 2024-08-28T09:29:02+01:00 2024-10-21T05:00:00+01:00 2024-10-31T05:00:00+00:00 TWh 0.441907999 2.638639701 3.0805477 Planned Outage
Ald 7
21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000932_002 Active Planned Storage unavailability 2024-06-19T12:08:32+01:00 2026-04-10T05:00:00+01:00 2027-04-10T05:00:00+01:00 TWh 0.412 2.7501642 3.1621642 Planned Outage
Ald 1 - AHP
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000865_001 Active Planned Injection unavailability 2023-11-28T09:32:01+00:00 2026-10-24T05:00:00+01:00 2026-10-24T18:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
GC- Siemens maintenance.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000864_001 Active Planned Injection unavailability 2023-11-28T09:29:35+00:00 2026-10-25T05:00:00+00:00 2026-11-08T18:00:00+00:00 GWh/d 111.02 200.54 311.56 Planned Outage
GC-3 outage.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000863_001 Active Planned Injection unavailability 2023-11-28T09:26:33+00:00 2026-10-19T05:00:00+01:00 2026-10-23T18:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
GC-2 outage.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000862_001 Active Planned Injection unavailability 2023-11-28T09:23:56+00:00 2026-10-12T05:00:00+01:00 2026-10-16T18:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
GC-1 outage.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000861_001 Active Planned Withdrawal unavailability 2023-11-28T09:20:21+00:00 2026-05-30T05:00:00+01:00 2026-06-14T18:00:00+01:00 GWh/d 121.5 220.8 342.3 Planned Outage
Production train 1 outage.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000860_001 Active Planned Withdrawal unavailability 2023-11-28T09:17:51+00:00 2026-05-02T05:00:00+01:00 2026-05-09T05:00:00+01:00 GWh/d 121.5 220.8 342.3 Planned Outage
Production train 2 outage.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000859_001 Active Planned Withdrawal unavailability 2023-11-28T09:12:48+00:00 2026-05-09T05:00:00+01:00 2026-05-24T18:00:00+01:00 GWh/d 342.3 0 342.3 Planned Outage
Full outage. Withdrawal.
21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000858_001 Active Planned Injection unavailability 2023-11-28T09:07:13+00:00 2026-05-09T05:00:00+01:00 2026-05-24T18:00:00+01:00 GWh/d 311.56 0 311.56 Planned Outage
Full outage. Injection.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000857_001 Active Planned Injection unavailability 2023-11-27T14:25:31+00:00 2025-10-27T05:00:00+00:00 2025-10-27T18:00:00+00:00 GWh/d 111.02 200.54 311.56 Planned Outage
GC-1. Siemens Maintenance.
21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000856_001 Active Planned Injection unavailability 2023-11-27T14:23:04+00:00 2025-10-28T05:00:00+00:00 2025-11-11T18:00:00+00:00 GWh/d 111.02 200.54 311.56 Planned Outage
GC-3. Level 3.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000855_001 Active Planned Injection unavailability 2023-11-27T14:21:39+00:00 2025-10-20T05:00:00+01:00 2025-10-26T18:00:00+00:00 GWh/d 111.02 200.54 311.56 Planned Outage
GC-2. Level 2.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000854_001 Active Planned Injection unavailability 2023-11-27T14:20:09+00:00 2025-10-13T05:00:00+01:00 2025-10-17T18:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
GC-1 Level 1.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000853_001 Active Planned Withdrawal unavailability 2023-11-27T13:17:17+00:00 2025-05-04T05:00:00+01:00 2025-05-10T05:00:00+01:00 GWh/d 121.5 220.8 342.3 Planned Outage
Production train 2 outage.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000852_001 Active Planned Withdrawal unavailability 2023-11-27T13:13:23+00:00 2025-05-10T05:00:00+01:00 2025-06-14T18:00:00+01:00 GWh/d 342.3 0 342.3 Planned Outage
Full site outage. Withdrawal.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000851_001 Active Planned Injection unavailability 2023-11-27T13:10:39+00:00 2025-05-10T05:00:00+01:00 2025-06-14T18:00:00+01:00 GWh/d 311.56 0 311.56 Planned Outage
Full site outage. Injection.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000483_005 Active Planned Injection unavailability 2023-11-10T08:26:00+00:00 2024-10-27T05:00:00+00:00 2024-11-09T18:00:00+00:00 GWh/d 111.02 200.54 311.56 Planned Outage
Comp 1 Outage. L3
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000834_002 Active Planned Injection unavailability 2023-11-10T08:09:26+00:00 2024-10-26T05:00:00+01:00 2024-10-26T18:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
Gas compressor 3. Siemens maintenance
21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000484_005 Active Planned Injection unavailability 2023-11-10T08:06:56+00:00 2024-10-21T05:00:00+01:00 2024-10-25T18:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
Comp 2 Outage. L1
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000782_001 Active Planned Withdrawal unavailability 2023-07-17T07:49:13+01:00 2027-07-01T05:00:00+01:00 2027-07-15T05:00:00+01:00 GWh/d 130 0 130 Planned Outage
2027 full site outage (Withdrawal)
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000781_001 Active Planned Injection unavailability 2023-07-17T07:45:35+01:00 2027-07-01T05:00:00+01:00 2027-07-15T05:00:00+01:00 GWh/d 30 0 30 Planned Outage
2027 Full Site outage (Injection)
21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000749_001 Active Planned Injection unavailability 2023-04-27T08:11:12+01:00 2026-07-01T05:00:00+01:00 2026-07-15T05:00:00+01:00 GWh/d 30 0 30 Planned Outage
Annual Full Site outage
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000748_001 Active Planned Withdrawal unavailability 2023-04-27T08:09:23+01:00 2026-07-01T05:00:00+01:00 2026-07-15T05:00:00+01:00 GWh/d 130 0 130 Planned Outage
Annual Full Site Outage
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000485_003 Dismissed Planned Injection unavailability 2023-11-01T08:33:49+00:00 2024-10-14T05:00:00+01:00 2024-10-18T18:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
Comp 3 Outage. L1
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000485_002 Dismissed Planned Injection unavailability 2023-07-06T11:10:28+01:00 2024-10-21T05:00:00+01:00 2024-10-26T05:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
Comp 3 Outage.
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000485_001 Dismissed Planned Injection unavailability 2020-07-11T16:42:39+01:00 2024-10-21T05:00:00+01:00 2024-10-26T05:00:00+01:00 GWh/d 111.02 200.54 311.56 Planned Outage
Comp 3 Outage
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000949_004 Dismissed Unplanned Storage unavailability 2024-09-30T10:03:19+01:00 2024-08-02T15:44:00+01:00 2024-12-20T18:00:00+00:00 TWh 0.3908 3.0778447 3.4686447 Failure
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000949_003 Dismissed Unplanned Storage unavailability 2024-09-03T14:30:09+01:00 2024-08-02T15:44:00+01:00 2024-10-17T18:00:00+01:00 TWh 0.3908 3.0778447 3.4686447 Failure
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000949_002 Dismissed Unplanned Storage unavailability 2024-08-05T09:25:20+01:00 2024-08-02T15:44:00+01:00 2024-10-01T05:00:00+01:00 TWh 0.3908 3.0778447 3.4686447 Failure
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000949_001 Dismissed Unplanned Storage unavailability 2024-08-02T15:46:10+01:00 2024-08-02T15:44:00+01:00 2024-08-16T05:00:00+01:00 TWh 0.3908 3.0778447 3.4686447 Failure
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000905_001 Dismissed Planned Withdrawal unavailability 2024-04-09T08:51:41+01:00 2024-04-09T08:50:00+01:00 2025-07-01T05:00:00+01:00 GWh/d 40 90 130 Planned Outage
Phase 6 Reduction
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000974_001 Dismissed Unplanned Injection unavailability 2024-10-13T10:06:12+01:00 2024-10-13T09:25:00+01:00 2024-10-13T12:00:00+01:00 GWh/d 311.56 0 311.56 Failure
PCS Card
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Aldbrough ALD_000000000000000000975_001 Dismissed Unplanned Withdrawal unavailability 2024-10-13T10:08:52+01:00 2024-10-13T09:25:00+01:00 2024-10-13T12:00:00+01:00 GWh/d 342.3 0 342.3 Failure
PCS Card
 21YGB-UKGASGRIDW 55WALDBOROUGH00H
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000965_003 Dismissed Planned Withdrawal unavailability 2024-10-04T14:36:37+01:00 2024-10-05T05:00:00+01:00 2024-10-11T18:00:00+01:00 GWh/d 100 30 130 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000965_002 Dismissed Planned Withdrawal unavailability 2024-10-03T14:46:29+01:00 2024-10-05T13:00:00+01:00 2024-10-11T18:00:00+01:00 GWh/d 100 30 130 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000965_001 Dismissed Planned Withdrawal unavailability 2024-10-01T08:01:54+01:00 2024-10-05T05:00:00+01:00 2024-10-11T18:00:00+01:00 GWh/d 100 30 130 Planned Outage
.
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000747_001 Dismissed Planned Injection unavailability 2023-04-27T08:07:00+01:00 2025-07-01T05:00:00+01:00 2025-07-15T05:00:00+01:00 GWh/d 30 0 30 Planned Outage
Annual Full Site outage
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Atwick ATW_000000000000000000746_001 Dismissed Planned Withdrawal unavailability 2023-04-27T08:04:47+01:00 2025-07-01T05:00:00+01:00 2025-07-15T05:00:00+01:00 GWh/d 130 0 130 Planned Outage
Annual Full site Outage
 21YGB-UKGASGRIDW 55WATWICK-SSE00J
SSE Hornsea Ltd
 A0001033U.UK
Explanation
The information that is set out on these pages is provided pursuant to Regulation (EU) 1227/2011 and associated guidance. The provision, reading or use of the information neither establishes a contract nor creates a unilateral guarantee. Nor does the provision of information constitute the furnishing of investment advice, or an invitation to buy or sell goods, derivatives or (other) financial instruments. If any provisions of this disclaimer shall be unlawful, void or for any reason unenforceable then that provision shall be deemed severable and shall not affect the validity and enforceability of the remaining provisions. This disclaimer is given on the basis of English law and shall be subject to the exclusive jurisdictions of the English courts. Historical UMMs as previously published can be located within the public area of our website – https://www.ssehl.co.uk/HALO. An explanation of how we calculate our maximum technical capacities and how we measure is available from https://www.ssehl.co.uk/HALO.