Last update at: 2024-07-26T15:00:00+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_000000000000000000825_003	Inactive	Planned	Injection unavailability	2024-07-23T11:25:03+01:00	2024-06-28T05:00:00+01:00	2024-07-23T11:24:00+01:00	GWh/d	30	0	30	Planned Outage	Full site outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000825_002	Dismissed	Planned	Injection unavailability	2024-07-22T15:58:49+01:00	2024-06-28T05:00:00+01:00	2024-07-23T12:00:00+01:00	GWh/d	30	0	30	Planned Outage	Full site outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000825_001	Dismissed	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
Aldbrough	ALD_000000000000000000945_002	Inactive	Planned	Injection unavailability	2024-07-16T13:29:25+01:00	2024-07-16T11:30:00+01:00	2024-07-16T13:30:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	PCS Download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000945_001	Dismissed	Planned	Injection unavailability	2024-07-16T11:04:29+01:00	2024-07-16T11:30:00+01:00	2024-07-16T13:30:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	PCS Download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000935_002	Inactive	Planned	Injection unavailability	2024-06-27T14:45:38+01:00	2024-06-27T08:00:00+01:00	2024-06-27T13:50:00+01:00	GWh/d	30	0	30	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000935_001	Dismissed	Planned	Injection unavailability	2024-06-18T13:06:51+01:00	2024-06-27T08:00:00+01:00	2024-06-27T16:00:00+01:00	GWh/d	30	0	30	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000933_002	Inactive	Planned	Injection unavailability	2024-06-26T16:05:36+01:00	2024-06-26T12:00:00+01:00	2024-06-26T16:00:00+01:00	GWh/d	30	0	30	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000933_001	Dismissed	Planned	Injection unavailability	2024-06-18T13:04:04+01:00	2024-06-26T12:00:00+01:00	2024-06-26T16:00:00+01:00	GWh/d	30	0	30	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000931_002	Inactive	Unplanned	Injection unavailability	2024-06-13T13:40:03+01:00	2024-06-12T17:00:00+01:00	2024-06-13T13:35:00+01:00	GWh/d	111.02	200.54	311.56	Failure	C2 Control Issues	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000931_001	Dismissed	Unplanned	Injection unavailability	2024-06-12T17:52:27+01:00	2024-06-12T17:00:00+01:00	2024-06-13T17:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	C2 Control Issues	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000929_002	Inactive	Unplanned	Injection unavailability	2024-06-12T16:11:30+01:00	2024-06-07T15:00:00+01:00	2024-06-12T16:10:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Harmonic Filter Failure	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000929_001	Dismissed	Unplanned	Injection unavailability	2024-06-07T15:31:04+01:00	2024-06-07T15:00:00+01:00	2024-06-12T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Harmonic Filter Failure	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000909_004	Inactive	Planned	Injection unavailability	2024-06-11T16:28:11+01:00	2024-06-11T12:00:00+01:00	2024-06-11T16:15:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	A4z software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000909_003	Dismissed	Planned	Injection unavailability	2024-06-11T16:13:50+01:00	2024-06-11T12:00:00+01:00	2024-06-11T16:15:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	A4z software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000909_002	Dismissed	Planned	Injection unavailability	2024-05-13T13:54:49+01:00	2024-06-11T12:00:00+01:00	2024-06-11T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	A4z software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000909_001	Dismissed	Planned	Injection unavailability	2024-04-17T14:43:14+01:00	2024-06-05T10:00:00+01:00	2024-06-05T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	A4z software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000927_002	Inactive	Unplanned	Injection unavailability	2024-05-25T19:37:23+01:00	2024-05-24T15:30:00+01:00	2024-05-25T19:30:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Loss of Comp 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000927_001	Dismissed	Unplanned	Injection unavailability	2024-05-24T15:35:01+01:00	2024-05-24T15:30:00+01:00	2024-05-29T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Loss of Comp 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000926_002	Inactive	Unplanned	Injection unavailability	2024-05-24T15:30:04+01:00	2024-05-24T10:58:00+01:00	2024-05-29T15:30:00+01:00	GWh/d	211.29	100.27	311.56	Failure	Loss of Comp 1 & 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000926_001	Dismissed	Unplanned	Injection unavailability	2024-05-24T11:01:23+01:00	2024-05-24T10:58:00+01:00	2024-05-29T18:00:00+01:00	GWh/d	211.29	100.27	311.56	Failure	Loss of Comp 1 & 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000925_002	Inactive	Planned	Injection unavailability	2024-05-24T10:57:58+01:00	2024-05-12T05:00:00+01:00	2024-05-24T10:57:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	ALD_00000479_010 - Updated in error showing total availability For Outage. This Remit has been published to reflect total Injection unavailability.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000925_001	Dismissed	Planned	Injection unavailability	2024-05-24T10:57:01+01:00	2024-05-12T05:00:00+01:00	2024-05-24T10:57:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	ALD_00000479_010 - Updated in error showing total availability For Outage. This Remit has been published to reflect total Injection unavailability.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	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_000000000000000000479_009	Dismissed	Planned	Injection unavailability	2024-05-24T07:47:29+01:00	2024-05-12T05:00:00+01:00	2024-05-29T18:00:00+01:00	GWh/d	211.29	100.27	311.56	Planned Outage	Loss of Comp 1 & 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_008	Dismissed	Planned	Injection unavailability	2024-05-22T08:57:54+01:00	2024-05-12T05:00:00+01:00	2024-05-29T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full injection outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_007	Dismissed	Planned	Injection unavailability	2024-02-26T13:07:00+00:00	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_000000000000000000479_006	Dismissed	Planned	Injection unavailability	2024-02-26T12:31:03+00:00	2024-05-12T05:00:00+01:00	2024-05-23T18:00:00+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_005	Dismissed	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_000000000000000000924_002	Dismissed	Unplanned	Injection unavailability	2024-05-22T09:29:47+01:00	2024-05-24T18:00:00+01:00	2024-05-26T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Comp 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000924_001	Dismissed	Unplanned	Injection unavailability	2024-05-21T14:43:53+01:00	2024-05-24T18:00:00+01:00	2024-05-26T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Comp 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000911_002	Inactive	Unplanned	Injection unavailability	2024-04-18T15:39:27+01:00	2024-04-15T13:20:00+01:00	2024-04-18T15:37:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Injection Comp 2 - 2nd Stage cooling failure. NG 908. rev 5702.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000911_001	Dismissed	Unplanned	Injection unavailability	2024-04-18T13:57:40+01:00	2024-04-15T13:20:00+01:00	2024-04-19T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Injection Comp 2 - 2nd Stage cooling failure. NG 908. rev 5702.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000908_002	Inactive	Unplanned	Injection unavailability	2024-04-18T13:02:32+01:00	2024-04-15T13:20:00+01:00	2024-04-18T12:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Injection Comp 2 - 2nd Stage cooling failure.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000908_001	Dismissed	Unplanned	Injection unavailability	2024-04-15T13:21:20+01:00	2024-04-15T13:20:00+01:00	2024-04-18T12:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Injection Comp 2 - 2nd Stage cooling failure.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000902_002	Inactive	Planned	Injection unavailability	2024-04-03T15:02:32+01:00	2024-04-03T10:00:00+01:00	2024-04-03T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Software download.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000902_001	Dismissed	Planned	Injection unavailability	2024-03-28T15:26:14+00:00	2024-04-03T10:00:00+01:00	2024-04-03T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Software download.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000899_002	Inactive	Unplanned	Injection unavailability	2024-03-27T16:02:47+00:00	2024-03-27T14:35:00+00:00	2024-03-27T16:00:00+00:00	GWh/d	311.56	0	311.56	Failure	ESD fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000899_001	Dismissed	Unplanned	Injection unavailability	2024-03-27T14:34:28+00:00	2024-03-27T14:35:00+00:00	2024-03-27T17:00:00+00:00	GWh/d	311.56	0	311.56	Failure	ESD fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000894_002	Inactive	Planned	Injection unavailability	2024-03-27T15:02:31+00:00	2024-03-27T08:00:00+00:00	2024-03-27T14:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	Software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000894_001	Dismissed	Planned	Injection unavailability	2024-03-04T08:24:29+00:00	2024-03-27T08:00:00+00:00	2024-03-27T14:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	Software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000893_002	Inactive	Unplanned	Injection unavailability	2024-02-26T18:27:54+00:00	2024-02-26T17:45:00+00:00	2024-02-26T18:30:00+00:00	GWh/d	111.02	200.54	311.56	Failure	Compressor 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000893_001	Dismissed	Unplanned	Injection unavailability	2024-02-26T17:45:57+00:00	2024-02-26T17:45:00+00:00	2024-02-26T22:00:00+00:00	GWh/d	111.02	200.54	311.56	Failure	Compressor 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000892_002	Inactive	Planned	Injection unavailability	2024-02-14T18:16:49+00:00	2024-02-14T05:00:00+00:00	2024-02-14T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	GC-1 HP BD valve replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000892_001	Dismissed	Planned	Injection unavailability	2024-02-13T15:01:09+00:00	2024-02-14T05:00:00+00:00	2024-02-14T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	GC-1 HP BD valve replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000890_002	Inactive	Unplanned	Injection unavailability	2024-02-13T12:58:21+00:00	2024-02-13T06:30:00+00:00	2024-02-13T13:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Site Trip	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.