Last update at: 2024-10-11T11:30:00+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
< 5 6 7 8 9 >
Atwick	ATW_000000000000000000708_003	Dismissed	Unplanned	Withdrawal unavailability	2022-12-10T15:15:53+00:00	2022-12-10T03:17:00+00:00	2022-12-11T08:00:00+00:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000708_002	Dismissed	Unplanned	Withdrawal unavailability	2022-12-10T04:26:40+00:00	2022-12-10T03:17:00+00:00	2022-12-10T16:00:00+00:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000708_001	Dismissed	Unplanned	Withdrawal unavailability	2022-12-10T03:22:46+00:00	2022-12-10T03:17:00+00:00	2022-12-11T16:00:00+00:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000707_003	Inactive	Unplanned	Injection unavailability	2022-11-27T09:55:45+00:00	2022-11-26T23:18:00+00:00	2022-11-27T09:50:00+00:00	GWh/d	111.02	200.54	311.56	Failure	Comp 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000707_002	Dismissed	Unplanned	Injection unavailability	2022-11-26T23:18:58+00:00	2022-11-26T23:18:00+00:00	2022-11-27T19:00:00+00:00	GWh/d	111.02	200.54	311.56	Failure	Comp 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000707_001	Dismissed	Unplanned	Injection unavailability	2022-11-26T23:18:15+00:00	2022-11-26T23:18:00+00:00	2022-11-27T19:00:00+00:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000700_003	Inactive	Unplanned	Storage unavailability	2022-11-04T14:39:29+00:00	2022-10-24T16:00:00+01:00	2022-11-04T14:35:00+00:00	TWh	0.89	2.0553019	3.3017895	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000700_002	Dismissed	Unplanned	Storage unavailability	2022-11-03T15:20:09+00:00	2022-10-24T16:00:00+01:00	2022-11-04T18:00:00+00:00	TWh	0.89	2.0553019	3.3017895	Failure		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_000000000000000000699_002	Inactive	Unplanned	Injection unavailability	2022-10-19T15:10:48+01:00	2022-10-19T11:10:00+01:00	2022-10-19T15:10:00+01:00	GWh/d	100.27	211.29	311.56	Failure	GC-2 booster pump failure	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000699_001	Dismissed	Unplanned	Injection unavailability	2022-10-19T12:05:19+01:00	2022-10-19T11:10:00+01:00	2022-10-19T18:00:00+01:00	GWh/d	100.27	211.29	311.56	Failure	GC-2 booster pump failure	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000697_003	Inactive	Unplanned	Storage unavailability	2022-10-11T17:19:30+01:00	2022-10-07T16:00:00+01:00	2022-10-11T17:19:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000697_002	Dismissed	Unplanned	Storage unavailability	2022-10-10T14:20:42+01:00	2022-10-07T16:00:00+01:00	2022-10-11T18:00:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000697_001	Dismissed	Unplanned	Storage unavailability	2022-10-07T16:43:43+01:00	2022-10-07T16:00:00+01:00	2022-10-10T16:00:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000694_002	Inactive	Unplanned	Injection unavailability	2022-10-06T15:33:31+01:00	2022-10-05T10:30:00+01:00	2022-10-06T15:30:00+01:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000694_001	Dismissed	Unplanned	Injection unavailability	2022-10-05T10:52:27+01:00	2022-10-05T10:30:00+01:00	2022-10-06T16:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000695_002	Inactive	Unplanned	Withdrawal unavailability	2022-10-05T16:52:04+01:00	2022-10-05T10:15:00+01:00	2022-10-05T16:30:00+01:00	GWh/d	121.5	220.8	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000695_001	Dismissed	Unplanned	Withdrawal unavailability	2022-10-05T10:54:29+01:00	2022-10-05T10:15:00+01:00	2022-10-05T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000693_001	Inactive	Planned	Withdrawal unavailability	2022-10-01T14:23:11+01:00	2022-09-21T16:20:00+01:00	2022-10-01T14:15:00+01:00	GWh/d	48.25	81.75	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000690_005	Dismissed	Unplanned	Withdrawal unavailability	2022-10-01T14:14:07+01:00	2022-09-21T16:20:00+01:00	2022-10-01T18:00:00+01:00	GWh/d	48.72	81.28	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000690_004	Dismissed	Unplanned	Withdrawal unavailability	2022-09-30T17:27:44+01:00	2022-09-21T16:20:00+01:00	2022-10-01T18:00:00+01:00	GWh/d	48.72	81.28	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000690_003	Dismissed	Unplanned	Withdrawal unavailability	2022-09-22T15:00:03+01:00	2022-09-21T16:20:00+01:00	2022-09-30T18:00:00+01:00	GWh/d	48.72	81.28	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000690_002	Dismissed	Unplanned	Withdrawal unavailability	2022-09-22T13:25:52+01:00	2022-09-21T16:20:00+01:00	2022-09-22T16:30:00+01:00	GWh/d	48.72	81.28	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000690_001	Dismissed	Unplanned	Withdrawal unavailability	2022-09-21T16:31:30+01:00	2022-09-21T16:20:00+01:00	2022-09-22T14:30:00+01:00	GWh/d	48.72	81.28	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000692_002	Inactive	Unplanned	Injection unavailability	2022-09-27T08:36:10+01:00	2022-09-27T08:00:00+01:00	2022-09-27T08:35:00+01:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000692_001	Dismissed	Unplanned	Injection unavailability	2022-09-27T08:19:15+01:00	2022-09-27T08:00:00+01:00	2022-09-27T12:00:00+01:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000683_002	Inactive	Planned	Injection unavailability	2022-09-07T18:01:40+01:00	2022-09-06T05:00:00+01:00	2022-09-07T17:58:00+01:00	GWh/d	311.56	0	311.56	Failure	Flowline 2 valve replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000683_001	Dismissed	Planned	Injection unavailability	2022-08-17T14:16:23+01:00	2022-09-06T05:00:00+01:00	2022-09-08T08:00:00+01:00	GWh/d	311.56	0	311.56	Failure	Flowline 2 valve replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000684_002	Inactive	Planned	Withdrawal unavailability	2022-09-07T18:01:20+01:00	2022-09-06T05:00:00+01:00	2022-09-07T17:58:00+01:00	GWh/d	342.3	0	342.3	Failure	Flowline 2 valve replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000684_001	Dismissed	Planned	Withdrawal unavailability	2022-08-17T14:23:45+01:00	2022-09-06T05:00:00+01:00	2022-09-08T08:00:00+01:00	GWh/d	342.3	0	342.3	Failure	Flowline 2 valve replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000682_003	Inactive	Unplanned	Storage unavailability	2022-09-06T06:01:53+01:00	2022-08-17T12:00:00+01:00	2022-09-06T05:00:00+01:00	TWh	0.424	2.0609147	2.4849147	Failure	Ald 2 Valve Replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000682_002	Dismissed	Unplanned	Storage unavailability	2022-08-17T15:55:28+01:00	2022-08-17T12:00:00+01:00	2022-09-06T05:00:00+01:00	TWh	0.424	2.0609147	2.4849147	Failure	Ald 2 Valve Replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000682_001	Dismissed	Unplanned	Storage unavailability	2022-08-17T12:10:52+01:00	2022-08-17T12:00:00+01:00	2022-08-31T19:00:00+01:00	TWh	0.424	2.0609147	2.4849147	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	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
Atwick	ATW_000000000000000000640_003	Inactive	Unplanned	Withdrawal unavailability	2022-08-01T06:02:33+01:00	2022-01-22T05:00:00+00:00	2022-08-01T05:00:00+01:00	GWh/d	30	100	130	Failure	This capacity will be available for limited durations but may not always be responsive to price signals	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000640_002	Dismissed	Unplanned	Withdrawal unavailability	2022-01-28T11:28:46+00:00	2022-01-22T05:00:00+00:00	2022-08-01T05:00:00+01:00	GWh/d	30	100	130	Failure	This capacity will be available for limited durations but may not always be responsive to price signals	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000640_001	Dismissed	Unplanned	Withdrawal unavailability	2022-01-21T11:27:54+00:00	2022-01-22T05:00:00+00:00	2022-01-29T05:00:00+00:00	GWh/d	30	100	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000675_002	Inactive	Unplanned	Withdrawal unavailability	2022-06-28T22:24:03+01:00	2022-06-24T22:23:00+01:00	2022-06-28T22:23:00+01:00	GWh/d	121.5	220.8	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000675_001	Dismissed	Unplanned	Withdrawal unavailability	2022-06-24T22:32:08+01:00	2022-06-24T22:23:00+01:00	2022-07-01T19:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure		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_000000000000000000668_003	Inactive	Unplanned	Withdrawal unavailability	2022-04-29T13:19:20+01:00	2022-04-22T13:00:00+01:00	2022-04-29T13:20:00+01:00	GWh/d	342.3	0	342.3	Failure	Production T1/T2	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000668_002	Dismissed	Unplanned	Withdrawal unavailability	2022-04-22T15:12:08+01:00	2022-04-22T13:00:00+01:00	2022-05-01T05:00:00+01:00	GWh/d	342.3	0	342.3	Failure	Production T1/T2	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000668_001	Dismissed	Unplanned	Withdrawal unavailability	2022-04-22T13:52:16+01:00	2022-04-22T13:00:00+01:00	2022-05-01T05:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Production T1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000665_004	Inactive	Unplanned	Withdrawal unavailability	2022-04-05T15:25:59+01:00	2022-04-04T07:00:00+01:00	2022-04-05T15:30:00+01:00	GWh/d	85	45	130	Failure		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.