Last update at: 2023-09-20T16:00:00+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_000000000000000000515_002	Dismissed	Planned	Storage unavailability	2020-10-29T13:50:12+00:00	2020-10-22T07:40:00+01:00	2020-10-29T18:00:00+00:00	TWh	0.43824719	2.70163421	3.1398814	Planned Outage	Cavity 9 Well Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000515_001	Dismissed	Planned	Storage unavailability	2020-10-22T07:41:20+01:00	2020-10-22T07:40:00+01:00	2020-10-30T18:00:00+00:00	TWh	0.43824719	2.70163421	3.1398814	Planned Outage	Cavity 9 Well Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000518_002	Inactive	Planned	Storage unavailability	2020-10-27T17:45:00+00:00	2020-10-27T07:00:00+00:00	2020-10-27T17:40:00+00:00	TWh	0.85813	2.2817514	3.1398814	Planned Outage	Cavity Maintenance (alongside existing REMIT notice)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000518_001	Dismissed	Planned	Storage unavailability	2020-10-26T17:14:00+00:00	2020-10-27T07:00:00+00:00	2020-10-27T19:00:00+00:00	TWh	0.85813	2.2817514	3.1398814	Planned Outage	Cavity Maintenance (alongside existing REMIT notice)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000514_002	Inactive	Unplanned	Storage unavailability	2020-10-15T17:15:12+01:00	2020-10-15T07:00:00+01:00	2020-10-15T17:15:00+01:00	TWh	0.38131	2.7585714	3.1398814	Failure	unplanned	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000514_001	Dismissed	Unplanned	Storage unavailability	2020-10-15T07:24:20+01:00	2020-10-15T07:00:00+01:00	2020-10-15T18:00:00+01:00	TWh	0.38131	2.7585714	3.1398814	Failure	unplanned	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000511_004	Dismissed	Unplanned	Storage unavailability	2020-10-14T12:51:35+01:00	2020-10-10T10:52:00+01:00	2020-10-14T12:52:00+01:00	TWh	0.28583	2.8540514	3.1398814	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000511_003	Dismissed	Unplanned	Storage unavailability	2020-10-13T14:19:22+01:00	2020-10-10T10:52:00+01:00	2020-10-14T13:00:00+01:00	TWh	0.28583	2.8540514	3.1398814	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000511_002	Dismissed	Unplanned	Storage unavailability	2020-10-11T16:27:33+01:00	2020-10-10T10:52:00+01:00	2020-10-13T18:00:00+01:00	TWh	0.28583	2.8540514	3.1398814	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000511_001	Dismissed	Unplanned	Storage unavailability	2020-10-10T10:59:54+01:00	2020-10-10T10:52:00+01:00	2020-10-12T18:00:00+01:00	TWh	0.28583	2.8540514	3.1398814	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000571_002	Inactive	Planned	Storage unavailability	2021-04-14T07:56:55+01:00	2021-04-14T06:00:00+01:00	2021-04-14T08:00:00+01:00	TWh	0.214379	2.9321538	3.1465328	Planned Outage	Maintenance A2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000571_001	Dismissed	Planned	Storage unavailability	2021-04-08T15:53:31+01:00	2021-04-14T06:00:00+01:00	2021-04-17T18:00:00+01:00	TWh	0.214379	2.9321538	3.1465328	Planned Outage	Maintenance A2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000569_002	Inactive	Planned	Storage unavailability	2021-04-09T15:34:19+01:00	2021-04-07T16:34:00+01:00	2021-04-09T15:30:00+01:00	TWh	0.38077	2.7657628	3.1465328	Planned Outage	Maintenance A1	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000569_001	Dismissed	Planned	Storage unavailability	2021-04-07T16:35:14+01:00	2021-04-07T16:34:00+01:00	2021-04-09T18:00:00+01:00	TWh	0.38077	2.7657628	3.1465328	Planned Outage	Maintenance A1	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000559_002	Dismissed	Planned	Storage unavailability	2021-02-15T10:48:41+00:00	2021-02-18T06:00:00+00:00	2021-02-19T18:00:00+00:00	TWh	0.419365007	2.727167793	3.1465328	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000559_001	Dismissed	Planned	Storage unavailability	2021-02-15T10:48:14+00:00	2021-02-18T06:00:00+00:00	2021-02-19T18:00:00+00:00	TWh	0.419365007	2.727167793	3.1465328	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000544_005	Inactive	Planned	Storage unavailability	2021-02-15T10:23:59+00:00	2021-02-18T06:00:00+00:00	2021-02-19T18:00:00+00:00	TWh	0.41988	2.7200014	3.1465328	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000544_004	Dismissed	Planned	Storage unavailability	2021-02-03T15:48:46+00:00	2021-02-18T06:00:00+00:00	2021-02-19T18:00:00+00:00	TWh	0.41988	2.7200014	3.1465328	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000544_003	Dismissed	Planned	Storage unavailability	2021-01-27T08:09:11+00:00	2021-02-08T06:00:00+00:00	2021-02-09T18:00:00+00:00	TWh	0.41988	2.7200014	3.1465328	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000799_002	Inactive	Planned	Storage unavailability	2023-09-17T20:02:32+01:00	2023-09-14T05:00:00+01:00	2023-09-17T19:00:00+01:00	TWh	0.3518	2.8103642	3.1621642	Planned Outage	ALD 5 Wellhead Maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000799_001	Dismissed	Planned	Storage unavailability	2023-08-30T15:54:37+01:00	2023-09-14T05:00:00+01:00	2023-09-17T19:00:00+01:00	TWh	0.3518	2.8103642	3.1621642	Planned Outage	ALD 5 Wellhead Maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000809_002	Inactive	Unplanned	Storage unavailability	2023-09-14T19:02:32+01:00	2023-09-14T10:00:00+01:00	2023-09-14T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Ald 3 WHM + RTS	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000809_001	Dismissed	Unplanned	Storage unavailability	2023-09-14T09:01:11+01:00	2023-09-14T10:00:00+01:00	2023-09-14T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Ald 3 WHM + RTS	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_005	Inactive	Planned	Storage unavailability	2023-09-14T06:02:32+01:00	2023-09-12T06:00:00+01:00	2023-09-14T05:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3 WHM	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_004	Dismissed	Planned	Storage unavailability	2023-09-13T09:51:24+01:00	2023-09-12T06:00:00+01:00	2023-09-14T05:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3 WHM	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_003	Dismissed	Planned	Storage unavailability	2023-08-30T15:28:22+01:00	2023-09-12T06:00:00+01:00	2023-09-22T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_002	Dismissed	Planned	Storage unavailability	2023-08-23T09:12:19+01:00	2023-09-10T06:00:00+01:00	2023-09-22T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000795_001	Active	Unplanned	Storage unavailability	2023-08-21T14:49:04+01:00	2024-09-02T05:00:00+01:00	2024-10-11T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_001	Active	Unplanned	Storage unavailability	2023-08-21T14:43:47+01:00	2024-05-02T05:00:00+01:00	2024-06-11T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000793_002	Inactive	Unplanned	Storage unavailability	2023-08-17T05:34:39+01:00	2023-08-16T20:57:00+01:00	2023-08-17T05:00:00+01:00	TWh	0.824	2.3381642	3.1621642	Failure	Ald 1 & 9	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000793_001	Dismissed	Unplanned	Storage unavailability	2023-08-16T20:58:10+01:00	2023-08-16T20:57:00+01:00	2023-08-17T05:00:00+01:00	TWh	0.824	2.3381642	3.1621642	Failure	Ald 1 & 9	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_001	Dismissed	Planned	Storage unavailability	2023-07-05T15:27:29+01:00	2023-09-12T06:00:00+01:00	2023-09-24T18:00:00+01:00	TWh	0.412	2.8872861	3.2992861	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000778_002	Inactive	Unplanned	Storage unavailability	2023-07-06T09:09:19+01:00	2023-07-06T02:25:00+01:00	2023-07-06T09:09:00+01:00	TWh	0.8395	2.4597861	3.2992861	Failure	Ald 7 Panel inaccessible	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000778_001	Dismissed	Unplanned	Storage unavailability	2023-07-06T02:40:52+01:00	2023-07-06T02:25:00+01:00	2023-07-06T12:00:00+01:00	TWh	0.8395	2.4597861	3.2992861	Failure	Ald 7 Panel inaccessible	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000773_002	Inactive	Unplanned	Storage unavailability	2023-07-06T02:29:10+01:00	2023-07-05T23:01:00+01:00	2023-07-06T02:25:00+01:00	TWh	3.2992861	0	3.2992861	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000773_001	Dismissed	Unplanned	Storage unavailability	2023-07-05T23:03:23+01:00	2023-07-05T23:01:00+01:00	2023-07-06T03:00:00+01:00	TWh	3.2992861	0	3.2992861	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000752_003	Dismissed	Planned	Storage unavailability	2023-06-23T08:34:18+01:00	2023-08-06T05:00:00+01:00	2023-10-26T18:00:00+01:00	TWh	0.435	2.8667895	3.2992861	Planned Outage	Loss of ALD 3	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_000000000000000000752_002	Dismissed	Planned	Storage unavailability	2023-05-05T14:40:37+01:00	2023-08-06T05:00:00+01:00	2023-10-26T18:00:00+01:00	TWh	0.435	2.8667895	3.3017895	Planned Outage	Loss of ALD 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000752_001	Dismissed	Planned	Storage unavailability	2023-05-04T12:58:06+01:00	2023-08-06T05:00:00+01:00	2023-10-26T18:00:00+01:00	TWh	1.27032	2.0314695	3.3017895	Planned Outage	Loss of ALD 3	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_000000000000000000753_002	Inactive	Unplanned	Storage unavailability	2023-05-26T18:16:40+01:00	2023-05-21T18:00:00+01:00	2023-05-26T18:00:00+01:00	TWh	0.934	2.3677895	3.3017895	Failure	Wells 1 & 9 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000753_001	Dismissed	Unplanned	Storage unavailability	2023-05-17T15:30:14+01:00	2023-05-21T18:00:00+01:00	2023-05-26T18:00:00+01:00	TWh	0.934	2.3677895	3.3017895	Failure	Wells 1 & 9 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000742_002	Inactive	Planned	Storage unavailability	2023-05-07T06:02:32+01:00	2023-04-27T05:00:00+01:00	2023-05-07T05:00:00+01:00	TWh	0.89	2.4117895	3.3017895	Planned Outage	Ald 8 Maintenance and sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000743_002	Inactive	Planned	Storage unavailability	2023-05-07T06:02:32+01:00	2023-04-30T05:00:00+01:00	2023-05-07T05:00:00+01:00	TWh	0.89	2.4117895	3.3017895	Planned Outage	Ald 2 maintenance and sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000743_001	Dismissed	Planned	Storage unavailability	2023-04-14T13:13:50+01:00	2023-04-30T05:00:00+01:00	2023-05-07T05:00:00+01:00	TWh	0.89	2.4117895	3.3017895	Planned Outage	Ald 2 maintenance and sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000742_001	Dismissed	Planned	Storage unavailability	2023-04-14T13:09:17+01:00	2023-04-27T05:00:00+01:00	2023-05-07T05:00:00+01:00	TWh	0.89	2.4117895	3.3017895	Planned Outage	Ald 8 Maintenance and sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000741_002	Inactive	Planned	Storage unavailability	2023-04-26T19:02:32+01:00	2023-04-17T05:00:00+01:00	2023-04-26T18:00:00+01:00	TWh	1.29	2.0117895	3.3017895	Planned Outage	Ald 1 Maintenance and Sonar Survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000741_001	Dismissed	Planned	Storage unavailability	2023-04-14T13:03:53+01:00	2023-04-17T05:00:00+01:00	2023-04-26T18:00:00+01:00	TWh	1.29	2.0117895	3.3017895	Planned Outage	Ald 1 Maintenance and Sonar Survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000737_003	Inactive	Planned	Storage unavailability	2023-03-29T13:02:32+01:00	2023-03-28T11:00:00+01:00	2023-03-29T12:00:00+01:00	TWh	0.75242	2.5493695	3.3017895	Planned Outage	Block placement	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.