Last update at: 2024-04-19T16:30:00+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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	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 >
Aldbrough	ALD_000000000000000000736_002	Dismissed	Planned	Withdrawal unavailability	2023-03-24T13:04:57+00:00	2023-03-28T11:00:00+01:00	2023-03-28T19:00:00+01:00	GWh/d	0.75242	341.54758	342.3	Planned Outage	Event type incorrect	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000736_001	Dismissed	Planned	Withdrawal unavailability	2023-03-24T12:47:44+00:00	2023-03-28T11:00:00+01:00	2023-03-28T19:00:00+01:00	GWh/d	0.75242	341.54758	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000477_001	Dismissed	Planned	Injection unavailability	2020-07-11T16:17:27+01:00	2023-10-16T05:00:00+01:00	2023-10-21T05:00:00+01:00	GWh/d	0	311.56	311.56	Planned Outage	Comp 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000906_005	Active	Unplanned	Withdrawal unavailability	2024-04-18T15:47:00+01:00	2024-04-11T00:30:00+01:00	2024-04-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000906_004	Dismissed	Unplanned	Withdrawal unavailability	2024-04-16T14:25:52+01:00	2024-04-11T00:30:00+01:00	2024-04-19T12:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000904_003	Inactive	Planned	Withdrawal unavailability	2024-04-12T08:29:18+01:00	2024-04-09T12:00:00+01:00	2024-04-12T08:30:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	PT 1. Choke stack replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000904_002	Dismissed	Planned	Withdrawal unavailability	2024-04-10T16:19:29+01:00	2024-04-09T12:00:00+01:00	2024-04-12T12:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	PT 1. Choke stack replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000904_001	Dismissed	Planned	Withdrawal unavailability	2024-04-03T11:35:06+01:00	2024-04-09T12:00:00+01:00	2024-04-11T12:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	PT 1. Choke stack replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000482_005	Active	Planned	Withdrawal unavailability	2024-03-08T09:57:56+00:00	2024-05-05T05:00:00+01:00	2024-05-31T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000482_004	Dismissed	Planned	Withdrawal unavailability	2024-02-26T12:31:55+00:00	2024-05-05T05:00:00+01:00	2024-05-30T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000482_003	Dismissed	Planned	Withdrawal unavailability	2023-11-01T08:58:13+00:00	2024-05-05T05:00:00+01:00	2024-05-27T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000482_002	Dismissed	Planned	Withdrawal unavailability	2023-07-06T11:07:56+01:00	2024-06-02T05:00:00+01:00	2024-06-16T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000482_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T16:34:24+01:00	2024-06-02T05:00:00+01:00	2024-06-16T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000481_004	Active	Planned	Withdrawal unavailability	2024-02-26T12:32:55+00:00	2024-06-08T05:00:00+01:00	2024-06-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000481_003	Dismissed	Planned	Withdrawal unavailability	2023-11-01T08:59:38+00:00	2024-06-01T05:00:00+01:00	2024-06-18T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000481_002	Dismissed	Planned	Withdrawal unavailability	2023-07-06T11:02:26+01:00	2024-05-10T05:00:00+01:00	2024-05-24T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000481_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T16:32:14+01:00	2024-05-10T05:00:00+01:00	2024-05-24T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 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_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_000000000000000000816_003	Inactive	Planned	Withdrawal unavailability	2023-10-06T09:02:31+01:00	2023-10-03T17:00:00+01:00	2023-10-06T08:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000816_002	Dismissed	Planned	Withdrawal unavailability	2023-10-04T11:03:34+01:00	2023-10-03T17:00:00+01:00	2023-10-06T08:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000816_001	Dismissed	Planned	Withdrawal unavailability	2023-10-03T16:35:43+01:00	2023-10-03T17:00:00+01:00	2023-10-05T08:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000808_003	Inactive	Unplanned	Withdrawal unavailability	2023-09-17T16:32:32+01:00	2023-09-09T11:55:00+01:00	2023-09-17T15:30:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 1 HIPPS	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000808_002	Dismissed	Unplanned	Withdrawal unavailability	2023-09-17T15:17:46+01:00	2023-09-09T11:55:00+01:00	2023-09-17T15:30:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 1 HIPPS	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000808_001	Dismissed	Unplanned	Withdrawal unavailability	2023-09-09T11:53:44+01:00	2023-09-09T11:55:00+01:00	2023-10-15T17:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 1 HIPPS	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000475_006	Inactive	Planned	Withdrawal unavailability	2023-06-28T09:07:19+01:00	2023-06-03T05:00:00+01:00	2023-06-28T09:07:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000475_005	Dismissed	Planned	Withdrawal unavailability	2023-06-22T08:40:34+01:00	2023-06-03T05:00:00+01:00	2023-06-28T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000475_004	Dismissed	Planned	Withdrawal unavailability	2023-06-19T08:14:17+01:00	2023-06-03T05:00:00+01:00	2023-06-23T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000475_003	Dismissed	Planned	Withdrawal unavailability	2023-01-16T11:07:57+00:00	2023-06-03T05:00:00+01:00	2023-06-19T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000475_002	Dismissed	Planned	Withdrawal unavailability	2022-06-01T22:27:29+01:00	2023-05-19T18:00:00+01:00	2023-06-16T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000475_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T16:12:17+01:00	2023-05-20T05:00:00+01:00	2023-06-16T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000473_005	Inactive	Planned	Withdrawal unavailability	2023-05-22T19:02:32+01:00	2023-05-07T05:00:00+01:00	2023-05-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000473_004	Dismissed	Planned	Withdrawal unavailability	2023-05-22T10:24:38+01:00	2023-05-07T05:00:00+01:00	2023-05-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000474_003	Inactive	Planned	Withdrawal unavailability	2023-05-22T19:02:32+01:00	2023-05-01T05:00:00+01:00	2023-05-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000474_002	Dismissed	Planned	Withdrawal unavailability	2023-01-16T10:53:07+00:00	2023-05-01T05:00:00+01:00	2023-05-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000474_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T16:09:58+01:00	2023-05-05T05:00:00+01:00	2023-05-19T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000720_002	Inactive	Planned	Withdrawal unavailability	2023-01-04T16:06:09+00:00	2023-01-04T08:00:00+00:00	2023-01-04T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production train 1, valve maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000720_001	Dismissed	Planned	Withdrawal unavailability	2023-01-03T13:31:11+00:00	2023-01-04T08:00:00+00:00	2023-01-04T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production train 1, valve maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000718_002	Inactive	Planned	Withdrawal unavailability	2022-12-30T16:53:25+00:00	2022-12-27T05:00:00+00:00	2022-12-30T16:54:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000718_001	Dismissed	Planned	Withdrawal unavailability	2022-12-23T12:27:31+00:00	2022-12-27T05:00:00+00:00	2022-12-30T18:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000719_002	Inactive	Planned	Withdrawal unavailability	2022-12-30T16:52:25+00:00	2022-12-27T05:00:00+00:00	2022-12-30T16:50:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000719_001	Dismissed	Planned	Withdrawal unavailability	2022-12-23T12:27:55+00:00	2022-12-27T05:00:00+00:00	2022-12-30T18:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000717_002	Inactive	Unplanned	Withdrawal unavailability	2022-12-23T12:14:34+00:00	2022-12-22T20:10:00+00:00	2022-12-23T12:00:00+00:00	GWh/d	121.5	220.8	342.3	Failure	Prod Train 2	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000717_001	Dismissed	Unplanned	Withdrawal unavailability	2022-12-22T20:14:18+00:00	2022-12-22T20:10:00+00:00	2022-12-23T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Failure	Prod Train 2	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000698_005	Inactive	Planned	Withdrawal unavailability	2022-11-04T00:57:46+00:00	2022-10-22T05:00:00+01:00	2022-11-04T00:57:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000698_004	Dismissed	Planned	Withdrawal unavailability	2022-10-30T09:47:15+00:00	2022-10-22T05:00:00+01:00	2022-11-04T18:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000698_003	Dismissed	Planned	Withdrawal unavailability	2022-10-30T01:21:29+00:00	2022-10-22T05:00:00+01:00	2022-10-30T11:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000698_002	Dismissed	Planned	Withdrawal unavailability	2022-10-27T13:27:45+01:00	2022-10-22T05:00:00+01:00	2022-10-30T05:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000698_001	Dismissed	Planned	Withdrawal unavailability	2022-10-15T16:29:04+01:00	2022-10-22T05:00:00+01:00	2022-10-29T05:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK

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.