Last update at: 2024-10-13T11:00:00+01:00

**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
< 7 8 9 10 11 >
Atwick	ATW_000000000000000000635_002	Inactive	Unplanned	Withdrawal unavailability	2022-01-13T16:37:33+00:00	2022-01-13T14:20:00+00:00	2022-01-13T16:30:00+00:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000635_001	Dismissed	Unplanned	Withdrawal unavailability	2022-01-13T14:26:34+00:00	2022-01-13T14:20:00+00:00	2022-01-13T18:00:00+00:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000634_002	Inactive	Unplanned	Injection unavailability	2022-01-13T16:37:09+00:00	2022-01-13T14:20:00+00:00	2022-01-13T16:30:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000634_001	Dismissed	Unplanned	Injection unavailability	2022-01-13T14:25:34+00:00	2022-01-13T14:20:00+00:00	2022-01-13T18:00:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000632_003	Inactive	Unplanned	Injection unavailability	2022-01-10T22:53:09+00:00	2022-01-10T06:30:00+00:00	2022-01-10T22:55:00+00:00	GWh/d	311.56	0	311.56	Failure	Power loss - full site/ Nitrogen unit failure caused by power loss	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000632_002	Dismissed	Unplanned	Injection unavailability	2022-01-10T11:19:13+00:00	2022-01-10T06:30:00+00:00	2022-01-12T18:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Power loss - full site/ Nitrogen unit failure caused by power loss	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000632_001	Dismissed	Unplanned	Injection unavailability	2022-01-10T06:43:39+00:00	2022-01-10T06:30:00+00:00	2022-01-10T12:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Power loss - full site	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000633_003	Inactive	Unplanned	Withdrawal unavailability	2022-01-10T16:23:04+00:00	2022-01-10T06:30:00+00:00	2022-01-10T16:23:00+00:00	GWh/d	342.3	0	342.3	Failure	Power Loss - Full Site/ Loss of nitrogen unit due to powerloss	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000633_002	Dismissed	Unplanned	Withdrawal unavailability	2022-01-10T11:20:31+00:00	2022-01-10T06:30:00+00:00	2022-01-10T20:00:00+00:00	GWh/d	342.3	0	342.3	Failure	Power Loss - Full Site/ Loss of nitrogen unit due to powerloss	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000633_001	Dismissed	Unplanned	Withdrawal unavailability	2022-01-10T06:44:48+00:00	2022-01-10T06:30:00+00:00	2022-01-10T12:00:00+00:00	GWh/d	342.3	0	342.3	Failure	Power Loss - Full Site	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000631_002	Inactive	Unplanned	Storage unavailability	2022-01-04T13:19:13+00:00	2022-01-04T11:23:00+00:00	2022-01-04T13:00:00+00:00	TWh	0.3012	3.014281	3.315481	Failure	A7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000631_001	Dismissed	Unplanned	Storage unavailability	2022-01-04T11:24:51+00:00	2022-01-04T11:23:00+00:00	2022-01-05T18:00:00+00:00	TWh	0.3012	3.014281	3.315481	Failure	A7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000630_003	Inactive	Unplanned	Storage unavailability	2021-12-22T16:02:07+00:00	2021-12-20T08:27:00+00:00	2021-12-22T16:01:00+00:00	TWh	0.400165903	2.456757	3.315481	Failure	Methanol injection issue at cavity.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000630_002	Dismissed	Unplanned	Storage unavailability	2021-12-21T14:37:24+00:00	2021-12-20T08:27:00+00:00	2021-12-22T18:00:00+00:00	TWh	0.400165903	2.456757	3.315481	Failure	Methanol injection issue at cavity.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000630_001	Dismissed	Unplanned	Storage unavailability	2021-12-20T08:45:47+00:00	2021-12-20T08:27:00+00:00	2021-12-21T16:00:00+00:00	TWh	0.400165903	2.456757	3.315481	Failure	Methanol injection issue at cavity.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000628_002	Inactive	Unplanned	Storage unavailability	2021-12-20T16:22:55+00:00	2021-12-19T18:10:00+00:00	2021-12-20T18:00:00+00:00	TWh	0.4586	2.856881	3.315481	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000628_001	Dismissed	Unplanned	Storage unavailability	2021-12-19T18:31:44+00:00	2021-12-19T18:10:00+00:00	2021-12-20T18:00:00+00:00	TWh	0.4586	2.856881	3.315481	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000629_004	Inactive	Unplanned	Withdrawal unavailability	2021-12-20T13:20:35+00:00	2021-12-19T23:30:00+00:00	2021-12-20T13:20:00+00:00	GWh/d	121.5	220.8	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000629_003	Dismissed	Unplanned	Withdrawal unavailability	2021-12-20T11:54:39+00:00	2021-12-19T23:30:00+00:00	2021-12-20T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000629_002	Dismissed	Unplanned	Withdrawal unavailability	2021-12-19T23:15:09+00:00	2021-12-19T23:30:00+00:00	2021-12-20T12:00:00+00:00	GWh/d	121.5	220.8	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000629_001	Dismissed	Unplanned	Withdrawal unavailability	2021-12-19T20:40:49+00:00	2021-12-19T20:30:00+00:00	2021-12-20T12:00:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000627_002	Inactive	Unplanned	Withdrawal unavailability	2021-12-19T19:06:10+00:00	2021-12-19T16:13:00+00:00	2021-12-19T19:00:00+00:00	GWh/d	94	36	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000627_001	Dismissed	Unplanned	Withdrawal unavailability	2021-12-19T16:18:40+00:00	2021-12-19T16:13:00+00:00	2021-12-19T21:00:00+00:00	GWh/d	94	36	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000621_002	Inactive	Unplanned	Storage unavailability	2021-12-06T16:01:28+00:00	2021-12-05T13:20:00+00:00	2021-12-06T16:02:00+00:00	TWh	0.3012	3.0280623	3.3292623	Failure	Cavity Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000621_001	Dismissed	Unplanned	Storage unavailability	2021-12-05T13:24:07+00:00	2021-12-05T13:20:00+00:00	2021-12-06T18:00:00+00:00	TWh	0.3012	3.0280623	3.3292623	Failure	Cavity Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000618_003	Inactive	Unplanned	Storage unavailability	2021-11-29T15:35:20+00:00	2021-11-24T16:23:00+00:00	2021-11-29T15:30:00+00:00	TWh	0.371148	2.9581143	3.3292623	Planned Outage	Cavity 3 outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000618_002	Dismissed	Unplanned	Storage unavailability	2021-11-26T12:31:29+00:00	2021-11-24T16:23:00+00:00	2021-11-29T18:00:00+00:00	TWh	0.371148	2.9581143	3.3292623	Planned Outage	Cavity 3 outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000618_001	Dismissed	Unplanned	Storage unavailability	2021-11-24T16:25:02+00:00	2021-11-24T16:23:00+00:00	2021-11-26T18:00:00+00:00	TWh	0.371148	2.9581143	3.3292623	Planned Outage	Cavity outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000620_002	Inactive	Unplanned	Withdrawal unavailability	2021-11-25T23:30:47+00:00	2021-11-25T20:30:00+00:00	2021-11-25T23:22:00+00:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000620_001	Dismissed	Unplanned	Withdrawal unavailability	2021-11-25T21:09:10+00:00	2021-11-25T20:30:00+00:00	2021-11-26T02:00:00+00:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000619_002	Inactive	Unplanned	Injection unavailability	2021-11-25T23:30:13+00:00	2021-11-25T20:30:00+00:00	2021-11-25T23:22:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000619_001	Dismissed	Unplanned	Injection unavailability	2021-11-25T21:07:53+00:00	2021-11-25T20:30:00+00:00	2021-11-26T02:00:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000617_002	Inactive	Unplanned	Withdrawal unavailability	2021-11-25T12:02:38+00:00	2021-11-24T10:22:00+00:00	2021-11-25T12:00:00+00:00	GWh/d	32.4	97.6	130	Failure	Vortisep unavailable	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000617_001	Dismissed	Unplanned	Withdrawal unavailability	2021-11-24T10:31:03+00:00	2021-11-24T10:22:00+00:00	2021-11-25T18:00:00+00:00	GWh/d	32.4	97.6	130	Failure	Vortisep unavailable	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000614_002	Inactive	Unplanned	Injection unavailability	2021-11-15T15:48:01+00:00	2021-11-12T22:51:00+00:00	2021-11-15T15:35:00+00:00	GWh/d	111.02	200.54	311.56	Failure	VSDS failure after outage completed	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000614_001	Dismissed	Unplanned	Injection unavailability	2021-11-12T22:52:38+00:00	2021-11-12T22:51:00+00:00	2021-11-15T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Failure	VSDS failure after outage completed	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000613_002	Inactive	Unplanned	Storage unavailability	2021-11-04T20:47:32+00:00	2021-11-04T07:34:00+00:00	2021-11-04T19:34:00+00:00	TWh	0.42058521	2.03523249	2.4558177	Failure	Packer Interlock.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000613_001	Dismissed	Unplanned	Storage unavailability	2021-11-04T08:31:21+00:00	2021-11-04T07:34:00+00:00	2021-11-04T19:34:00+00:00	TWh	0.42058521	2.03523249	2.4558177	Failure	Packer Interlock.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000965_004	Inactive	Planned	Withdrawal unavailability	2024-10-11T11:16:30+01:00	2024-10-05T05:00:00+01:00	2024-10-11T11:15:00+01:00	GWh/d	100	30	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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_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_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_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_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
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

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.