Last update at: 2023-11-28T13:00:00+00:00

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

All times are in UTC.

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_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
Atwick	ATW_000000000000000000846_002	Inactive	Planned	Injection unavailability	2023-11-27T14:00:50+00:00	2023-11-27T10:00:00+00:00	2023-11-27T14:00:00+00:00	GWh/d	30	0	30	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000846_001	Dismissed	Planned	Injection unavailability	2023-11-23T09:33:13+00:00	2023-11-27T10:00:00+00:00	2023-11-27T14:00:00+00:00	GWh/d	30	0	30	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000847_002	Inactive	Planned	Withdrawal unavailability	2023-11-27T13:59:01+00:00	2023-11-27T10:00:00+00:00	2023-11-27T13:58:00+00:00	GWh/d	130	0	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000847_001	Dismissed	Planned	Withdrawal unavailability	2023-11-23T09:34:15+00:00	2023-11-27T10:00:00+00:00	2023-11-27T14:00:00+00:00	GWh/d	130	0	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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
Atwick	ATW_000000000000000000850_003	Inactive	Unplanned	Withdrawal unavailability	2023-11-27T10:37:34+00:00	2023-11-27T00:10:00+00:00	2023-11-27T10:36:00+00:00	GWh/d	130	0	130	Failure	H2S	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000850_002	Dismissed	Unplanned	Withdrawal unavailability	2023-11-27T07:14:03+00:00	2023-11-27T00:10:00+00:00	2023-11-27T10:00:00+00:00	GWh/d	130	0	130	Failure	H2S	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000850_001	Dismissed	Unplanned	Withdrawal unavailability	2023-11-27T00:21:50+00:00	2023-11-27T00:10:00+00:00	2023-11-27T12:00:00+00:00	GWh/d	130	0	130	Failure	H2S	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000844_002	Inactive	Planned	Injection unavailability	2023-11-23T15:53:49+00:00	2023-11-23T12:00:00+00:00	2023-11-23T15:55:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	PCS download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000844_001	Dismissed	Planned	Injection unavailability	2023-11-15T10:33:20+00:00	2023-11-23T12:00:00+00:00	2023-11-23T16:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	PCS download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000845_002	Inactive	Planned	Withdrawal unavailability	2023-11-23T15:53:30+00:00	2023-11-23T12:00:00+00:00	2023-11-23T15:55:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	PCS Download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000845_001	Dismissed	Planned	Withdrawal unavailability	2023-11-15T10:34:42+00:00	2023-11-23T12:00:00+00:00	2023-11-23T16:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	PCS Download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_003	Inactive	Unplanned	Withdrawal unavailability	2023-11-09T14:25:28+00:00	2023-11-09T10:34:00+00:00	2023-11-09T14:25:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_002	Dismissed	Unplanned	Withdrawal unavailability	2023-11-09T13:23:48+00:00	2023-11-09T10:34:00+00:00	2023-11-09T14:30:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_001	Dismissed	Unplanned	Withdrawal unavailability	2023-11-09T10:35:13+00:00	2023-11-09T10:34:00+00:00	2023-11-09T13:00:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000837_002	Inactive	Unplanned	Withdrawal unavailability	2023-11-09T07:20:15+00:00	2023-11-09T05:05:00+00:00	2023-11-09T07:20:00+00:00	GWh/d	130	0	130	Failure	Fuel Gas	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000837_001	Dismissed	Unplanned	Withdrawal unavailability	2023-11-09T05:24:11+00:00	2023-11-09T05:05:00+00:00	2023-11-09T09:00:00+00:00	GWh/d	130	0	130	Failure	Fuel Gas	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000480_004	Active	Planned	Withdrawal unavailability	2023-11-01T08:20:00+00:00	2024-05-12T05:00:00+01:00	2024-05-26T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000480_003	Dismissed	Planned	Withdrawal unavailability	2023-07-25T08:34:12+01:00	2024-05-12T05:00:00+01:00	2024-05-21T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000480_002	Dismissed	Planned	Withdrawal unavailability	2021-06-30T09:54:19+01:00	2024-05-12T05:00:00+01:00	2024-05-21T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000480_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T16:29:20+01:00	2024-05-12T05:00:00+01:00	2024-05-24T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_005	Active	Planned	Injection unavailability	2023-11-01T08:19:18+00:00	2024-05-12T05:00:00+01:00	2024-05-26T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_004	Dismissed	Planned	Injection unavailability	2023-07-25T08:42:49+01:00	2024-05-12T05:00:00+01:00	2024-05-21T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_003	Dismissed	Planned	Injection unavailability	2020-09-20T09:03:10+01:00	2024-05-12T05:00:00+01:00	2024-05-21T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_002	Dismissed	Planned	Injection unavailability	2020-09-20T08:57:21+01:00	2024-05-12T05:00:00+01:00	2024-05-21T09:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_001	Dismissed	Planned	Injection unavailability	2020-07-11T16:25:45+01:00	2024-05-12T05:00:00+01:00	2024-05-24T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000832_002	Inactive	Unplanned	Injection unavailability	2023-10-30T18:07:12+00:00	2023-10-30T13:15:00+00:00	2023-10-30T17:15:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	SSSV testing.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000832_001	Dismissed	Unplanned	Injection unavailability	2023-10-30T13:21:50+00:00	2023-10-30T13:15:00+00:00	2023-10-30T17:15:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	SSSV testing.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000833_002	Inactive	Unplanned	Withdrawal unavailability	2023-10-30T18:06:47+00:00	2023-10-30T13:15:00+00:00	2023-10-30T17:15:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	SSSV testing.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000833_001	Dismissed	Unplanned	Withdrawal unavailability	2023-10-30T13:23:05+00:00	2023-10-30T13:15:00+00:00	2023-10-30T17:15:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	SSSV testing.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000831_002	Inactive	Unplanned	Withdrawal unavailability	2023-10-29T15:24:04+00:00	2023-10-29T12:45:00+00:00	2023-10-29T15:22:00+00:00	GWh/d	130	0	130	Failure	Unavailable for withdrawal	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000831_001	Dismissed	Unplanned	Withdrawal unavailability	2023-10-29T12:55:02+00:00	2023-10-29T12:45:00+00:00	2023-10-29T18:00:00+00:00	GWh/d	130	0	130	Failure	Unavailable for withdrawal	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000826_001	Active	Planned	Withdrawal unavailability	2023-10-20T20:13:14+01:00	2024-06-28T05:00:00+01:00	2024-07-23T05:00:00+01:00	GWh/d	130	0	130	Planned Outage	Full site outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000825_001	Active	Planned	Injection unavailability	2023-10-20T20:09:26+01:00	2024-06-28T05:00:00+01:00	2024-07-23T05:00:00+01:00	GWh/d	30	0	30	Planned Outage	Full site outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000495_002	Dismissed	Planned	Injection unavailability	2023-10-20T17:28:55+01:00	2024-07-01T05:00:00+01:00	2024-07-15T05:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000495_001	Dismissed	Planned	Injection unavailability	2020-07-12T00:14:47+01:00	2024-07-01T05:00:00+01:00	2024-07-15T05:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000498_003	Dismissed	Planned	Withdrawal unavailability	2023-10-20T17:25:46+01:00	2024-07-01T05:00:00+01:00	2024-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000498_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T17:58:18+01:00	2024-07-01T05:00:00+01:00	2024-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000498_001	Dismissed	Planned	Withdrawal unavailability	2020-07-28T14:11:39+01:00	2020-07-01T05:00:00+01:00	2024-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000804_002	Inactive	Planned	Withdrawal unavailability	2023-10-10T15:42:19+01:00	2023-10-10T08:00:00+01:00	2023-10-10T15:41:00+01:00	GWh/d	130	0	130	Planned Outage	Withdrawal - USM Validations(Day 2)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000804_001	Dismissed	Planned	Withdrawal unavailability	2023-09-05T09:58:44+01:00	2023-10-10T08:00:00+01:00	2023-10-10T17:00:00+01:00	GWh/d	130	0	130	Planned Outage	Withdrawal - USM Validations(Day 2)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000803_002	Inactive	Planned	Injection unavailability	2023-10-10T15:41:40+01:00	2023-10-10T08:00:00+01:00	2023-10-10T15:41:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 2)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000803_001	Dismissed	Planned	Injection unavailability	2023-09-05T09:57:41+01:00	2023-10-10T08:00:00+01:00	2023-10-10T17:00:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 2)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000802_002	Inactive	Planned	Withdrawal unavailability	2023-10-09T16:28:31+01:00	2023-10-09T08:00:00+01:00	2023-10-09T16:25:00+01:00	GWh/d	130	0	130	Planned Outage	Withdrawal - USM Validations(Day 1)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000802_001	Dismissed	Planned	Withdrawal unavailability	2023-09-05T09:55:24+01:00	2023-10-09T08:00:00+01:00	2023-10-09T17:00:00+01:00	GWh/d	130	0	130	Planned Outage	Withdrawal - USM Validations(Day 1)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000801_002	Inactive	Planned	Injection unavailability	2023-10-09T16:27:06+01:00	2023-10-09T08:00:00+01:00	2023-10-09T16:25:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 1)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000801_001	Dismissed	Planned	Injection unavailability	2023-09-05T09:53:56+01:00	2023-10-09T08:00:00+01:00	2023-10-09T17:00:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 1)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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.