Last update at: 2024-04-30T13:30:00+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
< 3 4 5 6 7 >
Atwick	ATW_000000000000000000615_004	Dismissed	Planned	Storage unavailability	2021-12-03T11:51:48+00:00	2021-11-22T08:00:00+00:00	2021-12-07T18:00:00+00:00	TWh	0.45889	2.8703723	3.3292623	Planned Outage	Storage Cavern outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
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
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
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_000000000000000000618_003	Inactive	Unplanned	Storage unavailability	2021-11-29T15:35:20+00:00	2021-11-24T16:23:00+00:00	2021-11-29T15:30:00+00:00	TWh	0.371148	2.9581143	3.3292623	Planned Outage	Cavity 3 outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000618_002	Dismissed	Unplanned	Storage unavailability	2021-11-26T12:31:29+00:00	2021-11-24T16:23:00+00:00	2021-11-29T18:00:00+00:00	TWh	0.371148	2.9581143	3.3292623	Planned Outage	Cavity 3 outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000618_001	Dismissed	Unplanned	Storage unavailability	2021-11-24T16:25:02+00:00	2021-11-24T16:23:00+00:00	2021-11-26T18:00:00+00:00	TWh	0.371148	2.9581143	3.3292623	Planned Outage	Cavity outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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
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_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_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_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_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_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_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_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_000000000000000000601_004	Inactive	Unplanned	Storage unavailability	2021-08-09T18:08:02+01:00	2021-08-09T10:31:00+01:00	2021-08-09T18:08:00+01:00	TWh	2.4558177	0	2.4558177	Failure	Update to unavailable capacity	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000601_003	Dismissed	Unplanned	Storage unavailability	2021-08-09T15:57:12+01:00	2021-08-09T10:31:00+01:00	2021-08-09T20:00:00+01:00	TWh	2.4558177	0	2.4558177	Failure	Update to unavailable capacity	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000601_002	Dismissed	Unplanned	Storage unavailability	2021-08-09T10:55:55+01:00	2021-08-09T10:31:00+01:00	2021-08-09T16:00:00+01:00	TWh	2.4558177	0	2.4558177	Failure	Update to unavailable capacity	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000601_001	Dismissed	Unplanned	Storage unavailability	2021-08-09T10:40:50+01:00	2021-08-09T10:31:00+01:00	2021-08-09T16:00:00+01:00	TWh	2.45	0.0058177	2.4558177	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_007	Inactive	Planned	Storage unavailability	2021-07-27T10:56:20+01:00	2021-07-05T05:00:00+01:00	2021-07-27T11:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_006	Dismissed	Planned	Storage unavailability	2021-07-23T12:34:49+01:00	2021-07-05T05:00:00+01:00	2021-07-27T18:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_005	Dismissed	Planned	Storage unavailability	2021-07-21T08:10:28+01:00	2021-07-05T05:00:00+01:00	2021-07-23T18:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_004	Dismissed	Planned	Storage unavailability	2021-07-17T08:55:53+01:00	2021-07-05T05:00:00+01:00	2021-07-21T18:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_003	Dismissed	Planned	Storage unavailability	2021-07-17T00:09:55+01:00	2021-07-05T05:00:00+01:00	2021-07-19T00:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_002	Dismissed	Planned	Storage unavailability	2021-07-16T15:55:01+01:00	2021-07-05T05:00:00+01:00	2021-07-17T00:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_001	Dismissed	Planned	Storage unavailability	2021-07-01T09:42:41+01:00	2021-07-05T05:00:00+01:00	2021-07-16T18:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000594_002	Inactive	Unplanned	Storage unavailability	2021-07-20T09:12:07+01:00	2021-07-19T18:00:00+01:00	2021-07-20T12:00:00+01:00	TWh	0.81	1.6458177	2.4558177	Failure	2nd cavern unavailble	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000594_001	Dismissed	Unplanned	Storage unavailability	2021-07-19T18:58:06+01:00	2021-07-19T18:00:00+01:00	2021-07-20T12:00:00+01:00	TWh	0.81	1.6458177	2.4558177	Failure	2nd cavern unavailble	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000592_002	Inactive	Unplanned	Storage unavailability	2021-07-05T06:01:53+01:00	2021-07-02T17:10:00+01:00	2021-07-05T05:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Failure	Flowline 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000592_001	Dismissed	Unplanned	Storage unavailability	2021-07-02T17:11:51+01:00	2021-07-02T17:10:00+01:00	2021-07-05T05:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Failure	Flowline 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000589_002	Inactive	Unplanned	Storage unavailability	2021-06-22T16:50:46+01:00	2021-06-21T10:15:00+01:00	2021-06-22T16:55:00+01:00	TWh	0.43084	2.0249777	2.4558177	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000589_001	Dismissed	Unplanned	Storage unavailability	2021-06-21T10:19:06+01:00	2021-06-21T10:15:00+01:00	2021-06-23T18:00:00+01:00	TWh	0.43084	2.0249777	2.4558177	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000587_002	Inactive	Planned	Storage unavailability	2021-06-15T15:37:47+01:00	2021-06-15T05:00:00+01:00	2021-06-15T15:00:00+01:00	TWh	0.43084	2.0249777	2.4558177	Planned Outage	Wellhead Maint	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000587_001	Dismissed	Planned	Storage unavailability	2021-06-15T05:53:52+01:00	2021-06-15T05:00:00+01:00	2021-06-17T18:00:00+01:00	TWh	0.43084	2.0249777	2.4558177	Planned Outage	Wellhead Maint	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000583_003	Inactive	Planned	Storage unavailability	2021-06-02T15:34:06+01:00	2021-05-30T19:05:00+01:00	2021-06-02T15:34:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000583_002	Dismissed	Planned	Storage unavailability	2021-05-30T19:05:34+01:00	2021-05-30T19:05:00+01:00	2021-06-06T18:00:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000583_001	Dismissed	Planned	Storage unavailability	2021-05-05T16:01:27+01:00	2021-06-01T05:00:00+01:00	2021-06-06T18:00:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000582_003	Dismissed	Planned	Storage unavailability	2021-05-30T19:04:41+01:00	2021-05-27T16:30:00+01:00	2021-05-30T19:05:00+01:00	TWh	0.3012746	3.0312448	3.3325194	Planned Outage	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000582_002	Dismissed	Planned	Storage unavailability	2021-05-27T16:15:25+01:00	2021-05-27T16:30:00+01:00	2021-05-31T18:00:00+01:00	TWh	0.3012746	3.0312448	3.3325194	Planned Outage	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000582_001	Dismissed	Planned	Storage unavailability	2021-05-05T15:56:02+01:00	2021-05-28T05:00:00+01:00	2021-05-31T18:00:00+01:00	TWh	0.3012746	3.0312448	3.3325194	Planned Outage	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000581_002	Dismissed	Planned	Storage unavailability	2021-05-27T16:14:36+01:00	2021-05-24T05:00:00+01:00	2021-05-27T16:20:00+01:00	TWh	0.459502528	2.873016872	3.3325194	Planned Outage	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000581_001	Dismissed	Planned	Storage unavailability	2021-05-05T15:54:24+01:00	2021-05-24T05:00:00+01:00	2021-05-27T18:00:00+01:00	TWh	0.459502528	2.873016872	3.3325194	Planned Outage	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000584_002	Inactive	Unplanned	Storage unavailability	2021-05-11T17:44:38+01:00	2021-05-11T11:30:00+01:00	2021-05-11T17:30:00+01:00	TWh	0.4595	2.8730194	3.3325194	Failure	Methanol pump failure. Cavity unavailable for withdrawal.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000584_001	Dismissed	Unplanned	Storage unavailability	2021-05-11T11:46:57+01:00	2021-05-11T11:30:00+01:00	2021-05-12T16:00:00+01:00	TWh	0.4595	2.8730194	3.3325194	Failure	Methanol pump failure. Cavity unavailable for withdrawal.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000457_001	Dismissed	Planned	Storage unavailability	2020-07-11T13:21:51+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	TWh	2.3352656	0	2.3352656	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000921_002	Inactive	Unplanned	Withdrawal unavailability	2024-04-26T16:12:27+01:00	2024-04-26T15:32:00+01:00	2024-04-26T16:11:00+01:00	GWh/d	121.5	220.8	342.3	Failure	PT2 Regen Cooler Fan B	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000921_001	Dismissed	Unplanned	Withdrawal unavailability	2024-04-26T15:33:01+01:00	2024-04-26T15:32:00+01:00	2024-05-01T16:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	PT2 Regen Cooler Fan B	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.