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

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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
< 5 6 7 8 9 >
Atwick	ATW_000000000000000000605_002	Inactive	Unplanned	Withdrawal unavailability	2021-08-11T18:20:48+01:00	2021-08-11T13:15:00+01:00	2021-08-11T18:19:00+01:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000464_003	Dismissed	Planned	Injection unavailability	2021-09-07T10:55:34+01:00	2021-10-25T05:00:00+01:00	2021-10-29T18:00:00+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_000000000000000000463_003	Dismissed	Planned	Injection unavailability	2021-09-07T10:59:59+01:00	2021-10-31T05:00:00+00:00	2021-11-14T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 2 Outage + Commissioning	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000595_002	Inactive	Planned	Withdrawal unavailability	2021-09-09T10:34:17+01:00	2021-09-07T08:00:00+01:00	2021-09-09T10:33:00+01:00	GWh/d	130	0	130	Planned Outage	NG Requirement - Asset can Withdraw if required	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000606_001	Dismissed	Unplanned	Storage unavailability	2021-09-11T17:05:17+01:00	2021-09-11T17:03:00+01:00	2021-09-11T21:00:00+01:00	TWh	2.4558177	0	2.4558177	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000607_001	Dismissed	Unplanned	Injection unavailability	2021-09-11T17:06:21+01:00	2021-09-11T17:03:00+01:00	2021-09-11T21:00:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000608_001	Dismissed	Unplanned	Withdrawal unavailability	2021-09-11T17:07:42+01:00	2021-09-11T17:03:00+01:00	2021-09-11T21:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000608_002	Dismissed	Unplanned	Withdrawal unavailability	2021-09-11T20:46:42+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000607_002	Dismissed	Unplanned	Injection unavailability	2021-09-11T20:47:02+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000606_002	Dismissed	Unplanned	Storage unavailability	2021-09-11T20:47:24+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	TWh	2.4558177	0	2.4558177	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000606_003	Inactive	Unplanned	Storage unavailability	2021-09-11T22:01:15+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	TWh	2.4558177	0	2.4558177	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000608_003	Inactive	Unplanned	Withdrawal unavailability	2021-09-11T22:01:27+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000607_003	Inactive	Unplanned	Injection unavailability	2021-09-11T22:01:50+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000609_001	Dismissed	Planned	Withdrawal unavailability	2021-10-04T13:11:02+01:00	2021-10-12T05:00:00+01:00	2021-10-15T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Adsorber valve fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000465_002	Dismissed	Planned	Injection unavailability	2021-10-06T22:32:34+01:00	2022-05-08T05:00:00+01:00	2022-05-21T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000466_002	Dismissed	Planned	Withdrawal unavailability	2021-10-06T22:32:46+01:00	2022-05-08T05:00:00+01:00	2022-05-21T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000467_002	Dismissed	Planned	Withdrawal unavailability	2021-10-06T22:33:43+01:00	2022-06-04T05:00:00+01:00	2022-06-19T18:00:00+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_000000000000000000468_002	Dismissed	Planned	Withdrawal unavailability	2021-10-06T22:34:05+01:00	2022-05-01T05:00:00+01:00	2022-05-22T18:00:00+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_000000000000000000610_001	Dismissed	Planned	Injection unavailability	2021-10-08T10:42:16+01:00	2022-10-29T05:00:00+01:00	2022-10-30T05:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Compressor 1 Siemens maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000609_002	Dismissed	Planned	Withdrawal unavailability	2021-10-15T15:08:26+01:00	2021-10-12T05:00:00+01:00	2021-10-16T00:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Adsorber valve fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000609_003	Inactive	Planned	Withdrawal unavailability	2021-10-16T01:02:32+01:00	2021-10-12T05:00:00+01:00	2021-10-16T00:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Adsorber valve fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000611_001	Dismissed	Planned	Storage unavailability	2021-10-20T10:02:19+01:00	2021-10-20T10:00:00+01:00	2021-10-24T18:00:00+01:00	TWh	0.4149	2.0409177	2.4558177	Planned Outage	Aldbrough 8 wellhead maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000462_004	Dismissed	Planned	Injection unavailability	2021-10-21T13:45:47+01:00	2021-10-16T05:00:00+01:00	2021-10-31T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000596_002	Inactive	Planned	Injection unavailability	2021-10-21T16:33:44+01:00	2021-10-21T09:00:00+01:00	2021-10-21T16:30:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000597_002	Inactive	Planned	Withdrawal unavailability	2021-10-21T16:34:30+01:00	2021-10-21T09:00:00+01:00	2021-10-21T16:30:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000599_002	Inactive	Planned	Withdrawal unavailability	2021-10-22T16:16:02+01:00	2021-10-22T09:00:00+01:00	2021-10-22T16:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000598_002	Inactive	Planned	Injection unavailability	2021-10-22T16:16:59+01:00	2021-10-22T09:00:00+01:00	2021-10-22T16:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000611_002	Inactive	Planned	Storage unavailability	2021-10-24T19:02:32+01:00	2021-10-20T10:00:00+01:00	2021-10-24T18:00:00+01:00	TWh	0.4149	2.0409177	2.4558177	Planned Outage	Aldbrough 8 wellhead maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000462_005	Dismissed	Planned	Injection unavailability	2021-10-28T10:54:58+01:00	2021-10-16T05:00:00+01:00	2021-11-05T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage. Extended due to valve issues.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000464_004	Dismissed	Planned	Injection unavailability	2021-10-29T17:05:18+01:00	2021-10-25T05:00:00+01:00	2021-10-30T09:00:00+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_000000000000000000464_005	Dismissed	Planned	Injection unavailability	2021-10-30T08:19:44+01:00	2021-10-25T05:00:00+01:00	2021-10-31T10:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 3 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000464_006	Inactive	Planned	Injection unavailability	2021-10-30T17:57:17+01:00	2021-10-25T05:00:00+01:00	2021-10-30T18:00:00+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_000000000000000000529_002	Inactive	Planned	Injection unavailability	2021-10-30T19:02:31+01:00	2021-10-30T05:00:00+01:00	2021-10-30T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Gas Compressor 1 Siemens maintenance	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000612_001	Dismissed	Planned	Storage unavailability	2021-10-31T13:08:55+00:00	2021-10-31T13:00:00+00:00	2021-11-05T18:00:00+00:00	TWh	0.46913	2.8601323	3.3292623	Planned Outage	Scheduled maintenance A9	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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
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_000000000000000000462_006	Dismissed	Planned	Injection unavailability	2021-11-05T09:36:01+00:00	2021-10-16T05:00:00+01:00	2021-11-06T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage. Extended due to valve issues.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000612_002	Inactive	Planned	Storage unavailability	2021-11-05T14:48:59+00:00	2021-10-31T13:00:00+00:00	2021-11-05T15:00:00+00:00	TWh	0.46913	2.8601323	3.3292623	Planned Outage	Scheduled maintenance A9	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000462_007	Dismissed	Planned	Injection unavailability	2021-11-06T07:29:25+00:00	2021-10-16T05:00:00+01:00	2021-11-11T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage. Extended due to valve issues.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000462_008	Dismissed	Planned	Injection unavailability	2021-11-10T10:43:42+00:00	2021-10-16T05:00:00+01:00	2021-11-15T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage. Extended due to valve issues.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000462_009	Dismissed	Planned	Injection unavailability	2021-11-11T12:55:15+00:00	2021-10-16T05:00:00+01:00	2021-11-17T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage. Extended due to valve issues.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000463_004	Inactive	Planned	Injection unavailability	2021-11-12T22:10:06+00:00	2021-10-31T05:00:00+00:00	2021-11-12T22:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 2 Outage + Commissioning	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
Atwick	ATW_000000000000000000615_001	Dismissed	Planned	Storage unavailability	2021-11-15T11:46:54+00:00	2021-11-22T08:00:00+00:00	2021-12-06T12:00:00+00:00	TWh	0	3.3292623	3.3292623	Planned Outage	ATW 8 storage cavern will be out of service for the duration of the REMIT	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000615_002	Dismissed	Planned	Storage unavailability	2021-11-15T11:47:51+00:00	2021-11-22T08:00:00+00:00	2021-12-06T12:00:00+00:00	TWh	0	3.3292623	3.3292623	Planned Outage	Storage Cavern outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000615_003	Dismissed	Planned	Storage unavailability	2021-11-15T12:01:50+00:00	2021-11-22T08:00:00+00:00	2021-12-06T12:00:00+00:00	TWh	0.45889	2.8703723	3.3292623	Planned Outage	Storage Cavern outage	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_000000000000000000462_010	Dismissed	Planned	Injection unavailability	2021-11-16T20:46:36+00:00	2021-10-16T05:00:00+01:00	2021-11-19T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage. Extended due to valve issues.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000462_011	Inactive	Planned	Injection unavailability	2021-11-18T12:24:25+00:00	2021-10-16T05:00:00+01:00	2021-11-19T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage. Extended due to valve issues.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000616_001	Dismissed	Planned	Injection unavailability	2021-11-18T12:56:10+00:00	2021-11-18T12:40:00+00:00	2022-01-31T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Failure	Comp 3 unavailability due to degraded N2 generation performance.	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.