Last update at: 2024-09-17T13:30:00+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 >
Atwick	ATW_000000000000000000959_001	Dismissed	Unplanned	Withdrawal unavailability	2024-09-09T17:29:24+01:00	2024-09-09T17:29:00+01:00	2024-09-11T18:00:00+01:00	GWh/d	0	48	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_010	Inactive	Planned	Injection unavailability	2024-05-24T10:49:22+01:00	2024-05-12T05:00:00+01:00	2024-05-29T07:30:00+01:00	GWh/d	0	311.56	311.56	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
Atwick	ATW_000000000000000000798_002	Inactive	Planned	Injection unavailability	2023-08-30T16:27:14+01:00	2023-08-30T09:50:00+01:00	2023-08-30T16:15:00+01:00	GWh/d	0	30	30	Planned Outage	ESD testing	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000798_001	Dismissed	Planned	Injection unavailability	2023-08-30T09:48:05+01:00	2023-08-30T09:50:00+01:00	2023-08-30T18:00:00+01:00	GWh/d	0	30	30	Planned Outage	ESD testing	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_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
Aldbrough	ALD_000000000000000000733_002	Dismissed	Planned	Storage unavailability	2023-03-02T15:20:04+00:00	2024-03-01T06:00:00+00:00	2024-03-01T06:30:00+00:00	TWh	0.01	3.2917895	3.3017895	Planned Outage	Publication for test purpose only. No loss of availability.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000733_001	Dismissed	Planned	Storage unavailability	2023-03-02T15:17:22+00:00	2024-03-01T06:00:00+00:00	2024-03-01T06:30:00+00:00	TWh	0.01	3.2917895	3.3017895	Planned Outage	Publication for test purpose only. No loss of availability.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000661_007	Inactive	Unplanned	Storage unavailability	2023-06-16T10:22:16+01:00	2022-03-22T14:15:00+00:00	2023-06-16T10:20:00+01:00	TWh	0.06761	2.3882077	3.2992861	Failure	Cavern 4 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000661_006	Dismissed	Unplanned	Storage unavailability	2023-01-12T12:44:15+00:00	2022-03-22T14:15:00+00:00	2023-12-31T05:00:00+00:00	TWh	0.06761	2.3882077	3.3017895	Failure	Cavern 4 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000661_005	Dismissed	Unplanned	Storage unavailability	2022-10-25T15:30:17+01:00	2022-03-22T14:15:00+00:00	2023-01-31T05:00:00+00:00	TWh	0.06761	2.3882077	2.9453019	Failure	Cavern 4 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000661_004	Dismissed	Unplanned	Storage unavailability	2022-09-05T15:54:31+01:00	2022-03-22T14:15:00+00:00	2022-11-01T05:00:00+00:00	TWh	0.06761	2.3882077	2.9453019	Failure	Cavern 4 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000661_003	Dismissed	Unplanned	Storage unavailability	2022-07-27T15:33:45+01:00	2022-03-22T14:15:00+00:00	2022-09-12T14:15:00+01:00	TWh	0.06761	2.3882077	2.4849147	Failure	Cavern 4 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000661_002	Dismissed	Unplanned	Storage unavailability	2022-05-12T13:27:22+01:00	2022-03-22T14:15:00+00:00	2022-08-22T14:15:00+01:00	TWh	0.06761	2.3882077	2.4849147	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000661_001	Dismissed	Unplanned	Storage unavailability	2022-03-22T14:11:42+00:00	2022-03-22T14:15:00+00:00	2022-06-22T14:15:00+01:00	TWh	0.06761	2.3882077	2.4558177	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000944_002	Inactive	Planned	Storage unavailability	2024-07-18T21:12:12+01:00	2024-07-07T23:30:00+01:00	2024-07-18T21:30:00+01:00	TWh	0.231	2.9311642	3.1621642	Planned Outage	A6 WHM sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000944_001	Dismissed	Planned	Storage unavailability	2024-07-04T15:30:49+01:00	2024-07-07T23:30:00+01:00	2024-07-20T19:00:00+01:00	TWh	0.231	2.9311642	3.1621642	Planned Outage	A6 WHM sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000843_002	Dismissed	Planned	Storage unavailability	2024-06-13T15:25:00+01:00	2024-10-01T05:00:00+01:00	2024-12-31T05:00:00+00:00	TWh	0.232	2.9301642	3.1621642	Planned Outage	Cavern 6. Removed from service AHS.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000843_001	Dismissed	Planned	Storage unavailability	2023-11-13T10:05:32+00:00	2024-10-01T05:00:00+01:00	2024-12-31T05:00:00+00:00	TWh	0.232	2.9301642	3.1621642	Planned Outage	Cavern 6. Removed from service AHS.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000805_002	Inactive	Planned	Storage unavailability	2023-09-12T10:32:11+01:00	2023-09-11T08:00:00+01:00	2023-09-12T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000805_001	Dismissed	Planned	Storage unavailability	2023-09-07T13:34:25+01:00	2023-09-11T08:00:00+01:00	2023-09-12T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000760_004	Inactive	Planned	Storage unavailability	2023-06-21T11:16:09+01:00	2023-06-02T09:00:00+01:00	2023-06-21T11:15:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Wellhead maintenance and intervention works.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000760_003	Dismissed	Planned	Storage unavailability	2023-06-20T17:32:54+01:00	2023-06-02T09:00:00+01:00	2023-06-21T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Wellhead maintenance and intervention works.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000760_002	Dismissed	Planned	Storage unavailability	2023-06-17T13:36:43+01:00	2023-06-02T09:00:00+01:00	2023-06-20T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Wellhead maintenance and intervention works.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000760_001	Dismissed	Planned	Storage unavailability	2023-05-30T09:33:05+01:00	2023-06-02T09:00:00+01:00	2023-06-18T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Wellhead maintenance and intervention works.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000722_002	Inactive	Planned	Storage unavailability	2023-01-19T19:02:32+00:00	2023-01-19T06:00:00+00:00	2023-01-19T18:00:00+00:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Six Monthly Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000722_001	Dismissed	Planned	Storage unavailability	2023-01-10T07:29:17+00:00	2023-01-19T06:00:00+00:00	2023-01-19T18:00:00+00:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Six Monthly Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000815_003	Inactive	Planned	Storage unavailability	2023-10-05T15:50:35+01:00	2023-10-03T16:00:00+01:00	2023-10-05T15:45:00+01:00	TWh	0.2383	3.2303447	3.4686447	Planned Outage	Cavity 2 SSSV	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000815_002	Dismissed	Planned	Storage unavailability	2023-10-04T15:53:28+01:00	2023-10-03T16:00:00+01:00	2023-10-05T16:00:00+01:00	TWh	0.2383	3.2303447	3.4686447	Planned Outage	Cavity 2 SSSV	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000815_001	Dismissed	Planned	Storage unavailability	2023-10-03T16:01:59+01:00	2023-10-03T16:00:00+01:00	2023-10-04T16:00:00+01:00	TWh	0.2383	3.2303447	3.4686447	Planned Outage	Cavity 2 SSSV	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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_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_000000000000000000818_002	Inactive	Planned	Storage unavailability	2023-10-17T19:26:22+01:00	2023-10-17T09:00:00+01:00	2023-10-17T19:24:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Planned Outage	Cavity 7 - 6 Monthly wellhead maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000818_001	Dismissed	Planned	Storage unavailability	2023-10-05T13:29:41+01:00	2023-10-17T09:00:00+01:00	2023-10-18T18:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Planned Outage	Cavity 7 - 6 Monthly wellhead maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000796_003	Inactive	Unplanned	Storage unavailability	2023-09-06T13:31:43+01:00	2023-08-25T08:00:00+01:00	2023-09-06T13:32:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000796_002	Dismissed	Unplanned	Storage unavailability	2023-08-31T09:36:10+01:00	2023-08-25T08:00:00+01:00	2023-09-06T18:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000796_001	Dismissed	Unplanned	Storage unavailability	2023-08-25T08:13:30+01:00	2023-08-25T08:00:00+01:00	2023-08-31T18:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000784_003	Inactive	Planned	Storage unavailability	2023-08-25T06:02:32+01:00	2023-07-31T05:00:00+01:00	2023-08-25T04:59:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Planned Outage	Cavity 7 Intervention Works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000784_002	Dismissed	Planned	Storage unavailability	2023-07-19T16:54:44+01:00	2023-07-31T05:00:00+01:00	2023-08-25T04:59:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Planned Outage	Cavity 7 Intervention Works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000784_001	Dismissed	Planned	Storage unavailability	2023-07-17T12:03:37+01:00	2023-07-24T05:00:00+01:00	2023-08-18T18:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Planned Outage	Cavity 7 Intervention Works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000754_002	Inactive	Unplanned	Storage unavailability	2023-05-25T14:47:07+01:00	2023-05-24T22:35:00+01:00	2023-05-25T14:45:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000754_001	Dismissed	Unplanned	Storage unavailability	2023-05-24T22:38:19+01:00	2023-05-24T22:35:00+01:00	2023-05-25T15:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000681_004	Inactive	Unplanned	Storage unavailability	2022-08-02T22:02:33+01:00	2022-08-01T19:34:00+01:00	2022-08-02T21:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000681_003	Dismissed	Unplanned	Storage unavailability	2022-08-02T17:07:13+01:00	2022-08-01T19:34:00+01:00	2022-08-02T21:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000681_002	Dismissed	Unplanned	Storage unavailability	2022-08-01T19:36:14+01:00	2022-08-01T19:34:00+01:00	2022-08-02T18:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000681_001	Dismissed	Unplanned	Storage unavailability	2022-08-01T19:33:01+01:00	2022-08-01T19:40:00+01:00	2022-08-02T18:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000948_003	Inactive	Unplanned	Storage unavailability	2024-08-09T12:07:17+01:00	2024-07-26T14:50:00+01:00	2024-08-09T12:15:00+01:00	TWh	0.339	2.8231642	3.0805477	Failure	Ald 5 outage.	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.