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

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
< 1 2 3 4 5 >
Aldbrough	ALD_000000000000000000674_004	Dismissed	Planned	Storage unavailability	2022-06-24T06:10:21+01:00	2022-06-23T05:00:00+01:00	2022-06-24T06:10:00+01:00	TWh	0.89773	1.5871847	2.4849147	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000674_003	Dismissed	Planned	Storage unavailability	2022-06-23T10:48:46+01:00	2022-06-23T05:00:00+01:00	2022-06-24T19:00:00+01:00	TWh	0.89773	1.5871847	2.4849147	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000674_002	Dismissed	Planned	Storage unavailability	2022-06-23T10:48:21+01:00	2022-06-23T05:00:00+01:00	2022-06-24T17:00:00+01:00	TWh	0.89773	1.5871847	2.4849147	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000674_001	Dismissed	Planned	Storage unavailability	2022-06-22T15:50:46+01:00	2022-06-23T05:00:00+01:00	2022-06-23T17:00:00+01:00	TWh	0.89773	1.5871847	2.4849147	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000673_002	Inactive	Unplanned	Storage unavailability	2022-06-20T23:30:03+01:00	2022-06-20T20:30:00+01:00	2022-06-20T23:30:00+01:00	TWh	1.312219162	1.172695538	2.4849147	Failure	temporary Loss of ALD 1 & 8 due to high gas temps	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000673_001	Dismissed	Unplanned	Storage unavailability	2022-06-20T20:35:11+01:00	2022-06-20T20:30:00+01:00	2022-06-20T23:30:00+01:00	TWh	1.312219162	1.172695538	2.4849147	Failure	temporary Loss of ALD 1 & 8 due to high gas temps	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000669_002	Inactive	Unplanned	Storage unavailability	2022-05-06T08:14:53+01:00	2022-05-05T20:38:00+01:00	2022-05-06T08:15:00+01:00	TWh	0.47728	2.0076347	2.4849147	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000669_001	Dismissed	Unplanned	Storage unavailability	2022-05-05T20:40:52+01:00	2022-05-05T20:38:00+01:00	2022-05-06T08:38:00+01:00	TWh	0.47728	2.0076347	2.4849147	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000667_002	Inactive	Planned	Storage unavailability	2022-04-22T17:04:52+01:00	2022-04-20T00:00:00+01:00	2022-04-22T17:00:00+01:00	TWh	0.47366	2.0112547	2.4849147	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000667_001	Dismissed	Planned	Storage unavailability	2022-04-19T19:51:10+01:00	2022-04-20T00:00:00+01:00	2022-04-22T18:00:00+01:00	TWh	0.47366	2.0112547	2.4849147	Planned Outage		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_000000000000000000700_001	Dismissed	Unplanned	Storage unavailability	2022-10-24T16:14:15+01:00	2022-10-24T00:00:00+01:00	2022-11-04T00:00:00+00:00	TWh	0.89	2.0553019	2.9453019	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000691_003	Inactive	Planned	Storage unavailability	2022-10-02T17:05:09+01:00	2022-10-02T03:00:00+01:00	2022-10-02T17:05:00+01:00	TWh	1.2399	1.7054019	2.9453019	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000691_002	Dismissed	Planned	Storage unavailability	2022-10-02T10:19:17+01:00	2022-10-02T03:00:00+01:00	2022-10-02T18:00:00+01:00	TWh	1.2399	1.7054019	2.9453019	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000691_001	Dismissed	Planned	Storage unavailability	2022-09-23T16:24:34+01:00	2022-10-02T03:00:00+01:00	2022-10-02T18:00:00+01:00	TWh	1.701	1.2443019	2.9453019	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000677_002	Dismissed	Planned	Storage unavailability	2022-09-12T12:36:06+01:00	2022-09-16T05:00:00+01:00	2022-10-07T18:00:00+01:00	TWh	0.43	2.0549147	2.9453019	Planned Outage	A7 Wellhead works.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000544_002	Dismissed	Planned	Storage unavailability	2021-01-09T07:59:46+00:00	2021-02-08T06:00:00+00:00	2021-02-09T18:00:00+00:00	TWh	0.41988	2.7200014	3.1398814	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000544_001	Dismissed	Planned	Storage unavailability	2020-12-19T00:06:56+00:00	2021-01-18T06:00:00+00:00	2021-01-19T18:00:00+00:00	TWh	0.41988	2.7200014	3.1398814	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000543_004	Inactive	Planned	Storage unavailability	2020-12-18T14:42:23+00:00	2020-12-16T16:50:00+00:00	2020-12-18T14:35:00+00:00	TWh	0.43618	2.7037014	3.1398814	Planned Outage	Cavity 8 (Cav6 RTS 14:10 17/12)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000543_003	Dismissed	Planned	Storage unavailability	2020-12-17T14:14:11+00:00	2020-12-16T16:50:00+00:00	2020-12-18T16:00:00+00:00	TWh	0.43618	2.7037014	3.1398814	Planned Outage	Cavity 8 (Cav6 RTS 14:10 17/12)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000543_002	Dismissed	Planned	Storage unavailability	2020-12-16T16:56:31+00:00	2020-12-16T16:50:00+00:00	2020-12-18T16:00:00+00:00	TWh	0.85606	2.2838214	3.1398814	Planned Outage	Cavities 6&8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000543_001	Dismissed	Planned	Storage unavailability	2020-12-14T12:53:54+00:00	2020-12-16T18:00:00+00:00	2020-12-18T16:00:00+00:00	TWh	0.436181	2.7037004	3.1398814	Planned Outage	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000542_002	Inactive	Planned	Storage unavailability	2020-12-16T16:53:59+00:00	2020-12-15T07:00:00+00:00	2020-12-16T16:50:00+00:00	TWh	1.20905	1.9308314	3.1398814	Planned Outage	Cavities 3,6,8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000542_001	Dismissed	Planned	Storage unavailability	2020-12-14T12:48:56+00:00	2020-12-15T07:00:00+00:00	2020-12-16T18:00:00+00:00	TWh	1.20905	1.9308314	3.1398814	Planned Outage	Cavities 3,6,8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000527_004	Dismissed	Planned	Storage unavailability	2020-12-15T07:01:47+00:00	2020-12-14T12:00:00+00:00	2020-12-15T07:00:00+00:00	TWh	0.856064	2.2838174	3.1398814	Planned Outage	Cavity 6&8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000527_003	Dismissed	Planned	Storage unavailability	2020-12-14T12:01:55+00:00	2020-12-14T12:00:00+00:00	2020-12-15T07:00:00+00:00	TWh	0.856064	2.2838174	3.1398814	Planned Outage	Cavity 6&8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000527_002	Dismissed	Planned	Storage unavailability	2020-12-08T11:12:09+00:00	2020-12-15T07:00:00+00:00	2020-12-16T18:00:00+00:00	TWh	0.35298597	2.78689543	3.1398814	Planned Outage	Cavity 3	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000527_001	Dismissed	Planned	Storage unavailability	2020-11-23T11:59:23+00:00	2020-12-09T18:00:00+00:00	2020-12-11T18:00:00+00:00	TWh	0.35298597	2.78689543	3.1398814	Planned Outage	Cavity 3	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000525_005	Dismissed	Planned	Storage unavailability	2020-12-11T15:22:03+00:00	2020-12-09T18:00:00+00:00	2020-12-11T15:21:00+00:00	TWh	0.610986038	2.528895362	3.1398814	Planned Outage	Cavity 5 (FES ATEX repairs and Well Services)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000525_004	Dismissed	Planned	Storage unavailability	2020-12-08T15:54:02+00:00	2020-12-09T18:00:00+00:00	2020-12-11T18:00:00+00:00	TWh	0.610986038	2.528895362	3.1398814	Planned Outage	Cavity 5 (FES ATEX repairs and Well Services)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000525_003	Dismissed	Planned	Storage unavailability	2020-12-08T15:52:57+00:00	2020-12-09T08:00:00+00:00	2020-12-11T18:00:00+00:00	TWh	0.610986038	2.528895362	3.1398814	Planned Outage	Cavity 5 (FES ATEX repairs and Well Services)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000525_002	Dismissed	Planned	Storage unavailability	2020-12-08T11:58:44+00:00	2020-12-10T08:00:00+00:00	2020-12-11T18:00:00+00:00	TWh	0.610986038	2.528895362	3.1398814	Planned Outage	Cavity 5	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000525_001	Dismissed	Planned	Storage unavailability	2020-11-23T11:25:50+00:00	2020-12-07T18:00:00+00:00	2020-12-08T18:00:00+00:00	TWh	0.610986038	2.528895362	3.1398814	Planned Outage	Cavity 5	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000537_003	Inactive	Planned	Storage unavailability	2020-12-09T16:41:59+00:00	2020-12-08T11:15:00+00:00	2020-12-09T18:00:00+00:00	TWh	0.43618	2.7037014	3.1398814	Planned Outage	Cavity 3 WHP & Cavity 8 (Cav 3 RTS 14:11hrs)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000537_002	Dismissed	Planned	Storage unavailability	2020-12-08T14:17:22+00:00	2020-12-08T11:15:00+00:00	2020-12-09T18:00:00+00:00	TWh	0.43618	2.7037014	3.1398814	Planned Outage	Cavity 3 WHP & Cavity 8 (Cav 3 RTS 14:11hrs)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000537_001	Dismissed	Planned	Storage unavailability	2020-12-08T11:49:54+00:00	2020-12-08T11:15:00+00:00	2020-12-09T18:00:00+00:00	TWh	1.40015	1.7397314	3.1398814	Planned Outage	Cavity 3 WHP & Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000538_004	Inactive	Planned	Storage unavailability	2020-12-09T16:40:50+00:00	2020-12-09T08:00:00+00:00	2020-12-09T16:40:00+00:00	TWh	0.610986038	2.0927153	3.1398814	Planned Outage	Cavity 5 (FES ATEX Repairs) - alongside Cavity 8 REMIT 00000537	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000538_003	Dismissed	Planned	Storage unavailability	2020-12-08T16:07:34+00:00	2020-12-09T08:00:00+00:00	2020-12-09T17:59:00+00:00	TWh	0.610986038	2.0927153	3.1398814	Planned Outage	Cavity 5 (FES ATEX Repairs) - alongside Cavity 8 REMIT 00000537	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000538_002	Dismissed	Planned	Storage unavailability	2020-12-08T16:05:20+00:00	2020-12-09T08:00:00+00:00	2020-12-09T17:59:00+00:00	TWh	0.610986038	2.0927153	3.1398814	Failure	Cavity 5 (FES ATEX Repairs) - alongside Cavity 8 REMIT 00000537	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000538_001	Dismissed	Planned	Storage unavailability	2020-12-08T16:02:42+00:00	2020-12-09T08:00:00+00:00	2020-12-09T17:59:00+00:00	TWh	1.04717	2.0927114	3.1398814	Failure	Cavity 5 (FES ATEX Repairs) - alongside Cavity 8 REMIT 00000537	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000526_002	Dismissed	Planned	Storage unavailability	2020-12-08T11:52:22+00:00	2020-12-08T18:00:00+00:00	2020-12-09T18:00:00+00:00	TWh	0.436180926	2.703700474	3.1398814	Planned Outage	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000526_001	Dismissed	Planned	Storage unavailability	2020-11-23T11:56:33+00:00	2020-12-08T18:00:00+00:00	2020-12-09T18:00:00+00:00	TWh	0.436180926	2.703700474	3.1398814	Planned Outage	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000536_002	Dismissed	Planned	Storage unavailability	2020-12-08T11:46:13+00:00	2020-12-08T11:15:00+00:00	2020-12-08T18:00:00+00:00	TWh	0.35299	2.7868914	3.1398814	Planned Outage	Cavity 3 WHP	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000536_001	Dismissed	Planned	Storage unavailability	2020-12-08T11:26:10+00:00	2020-12-08T11:15:00+00:00	2020-12-08T18:00:00+00:00	TWh	0.35299	2.7868914	3.1398814	Planned Outage	Cavity 3 WHP	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000524_002	Dismissed	Planned	Storage unavailability	2020-12-07T16:50:46+00:00	2020-12-07T06:00:00+00:00	2020-12-07T16:30:00+00:00	TWh	0.214457605	2.925423795	3.1398814	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000524_001	Dismissed	Planned	Storage unavailability	2020-11-23T11:11:51+00:00	2020-12-07T06:00:00+00:00	2020-12-07T18:00:00+00:00	TWh	0.214457605	2.925423795	3.1398814	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000523_002	Inactive	Planned	Storage unavailability	2020-11-20T15:01:54+00:00	2020-11-19T13:45:00+00:00	2020-11-20T14:00:00+00:00	TWh	0.38131	2.7585714	3.1398814	Planned Outage	planned	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000523_001	Dismissed	Planned	Storage unavailability	2020-11-19T14:08:55+00:00	2020-11-19T13:45:00+00:00	2020-11-20T14:00:00+00:00	TWh	0.38131	2.7585714	3.1398814	Planned Outage	planned	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000515_003	Inactive	Planned	Storage unavailability	2020-10-29T18:07:31+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

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.