Last update at: 2024-04-27T14:30:00+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
< 4 5 6 7 8 >
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_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_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_000000000000000000726_001	Dismissed	Planned	Injection unavailability	2023-01-16T11:17:27+00:00	2023-05-06T05:00:00+01:00	2023-05-07T05:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Gas compressor 3.	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_000000000000000000744_002	Inactive	Planned	Injection unavailability	2023-04-26T15:02:32+01:00	2023-04-26T10:00:00+01:00	2023-04-26T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000745_002	Inactive	Planned	Withdrawal unavailability	2023-04-26T15:02:32+01:00	2023-04-26T10:00:00+01:00	2023-04-26T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000745_001	Dismissed	Planned	Withdrawal unavailability	2023-04-24T15:08:22+01:00	2023-04-26T10:00:00+01:00	2023-04-26T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000744_001	Dismissed	Planned	Injection unavailability	2023-04-24T15:07:12+01:00	2023-04-26T10:00:00+01:00	2023-04-26T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000740_002	Inactive	Unplanned	Withdrawal unavailability	2023-04-09T23:04:07+01:00	2023-04-09T20:58:00+01:00	2023-04-09T23:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000740_001	Dismissed	Unplanned	Withdrawal unavailability	2023-04-09T21:00:30+01:00	2023-04-09T20:58:00+01:00	2023-04-09T23:59:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000739_002	Dismissed	Unplanned	Withdrawal unavailability	2023-04-09T21:02:21+01:00	2023-04-09T20:58:00+01:00	2023-04-09T23:59:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000739_001	Dismissed	Unplanned	Withdrawal unavailability	2023-04-09T20:59:54+01:00	2023-04-09T20:58:00+01:00	2023-04-09T23:59:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000738_002	Dismissed	Unplanned	Withdrawal unavailability	2023-04-09T21:01:23+01:00	2023-04-09T20:58:00+01:00	2023-04-09T23:59:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000738_001	Dismissed	Unplanned	Withdrawal unavailability	2023-04-09T20:59:41+01:00	2023-04-09T20:58:00+01:00	2023-04-09T23:59:00+01:00	GWh/d	342.3	0	342.3	Failure		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
Aldbrough	ALD_000000000000000000737_002	Dismissed	Planned	Storage unavailability	2023-03-28T15:47:16+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
Aldbrough	ALD_000000000000000000737_001	Dismissed	Planned	Storage unavailability	2023-03-24T13:08:51+00:00	2023-03-28T11:00:00+01:00	2023-03-28T19:00:00+01:00	TWh	0.75242	2.5493695	3.3017895	Planned Outage	Block placement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000736_002	Dismissed	Planned	Withdrawal unavailability	2023-03-24T13:04:57+00:00	2023-03-28T11:00:00+01:00	2023-03-28T19:00:00+01:00	GWh/d	0.75242	341.54758	342.3	Planned Outage	Event type incorrect	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000736_001	Dismissed	Planned	Withdrawal unavailability	2023-03-24T12:47:44+00:00	2023-03-28T11:00:00+01:00	2023-03-28T19:00:00+01:00	GWh/d	0.75242	341.54758	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000733_002	Dismissed	Planned	Storage unavailability	2023-03-02T15:20:04+00:00	2024-03-01T06:00:00+00:00	2024-03-01T06:30:00+00:00	TWh	0.01	3.2917895	3.3017895	Planned Outage	Publication for test purpose only. No loss of availability.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000733_001	Dismissed	Planned	Storage unavailability	2023-03-02T15:17:22+00:00	2024-03-01T06:00:00+00:00	2024-03-01T06:30:00+00:00	TWh	0.01	3.2917895	3.3017895	Planned Outage	Publication for test purpose only. No loss of availability.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000725_002	Inactive	Unplanned	Injection unavailability	2023-01-12T14:46:40+00:00	2023-01-12T09:30:00+00:00	2023-01-12T14:45:00+00:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000725_001	Dismissed	Unplanned	Injection unavailability	2023-01-12T10:22:58+00:00	2023-01-12T09:30:00+00:00	2023-01-12T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000720_002	Inactive	Planned	Withdrawal unavailability	2023-01-04T16:06:09+00:00	2023-01-04T08:00:00+00:00	2023-01-04T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production train 1, valve maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000720_001	Dismissed	Planned	Withdrawal unavailability	2023-01-03T13:31:11+00:00	2023-01-04T08:00:00+00:00	2023-01-04T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production train 1, valve maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000718_002	Inactive	Planned	Withdrawal unavailability	2022-12-30T16:53:25+00:00	2022-12-27T05:00:00+00:00	2022-12-30T16:54:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000718_001	Dismissed	Planned	Withdrawal unavailability	2022-12-23T12:27:31+00:00	2022-12-27T05:00:00+00:00	2022-12-30T18:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000719_002	Inactive	Planned	Withdrawal unavailability	2022-12-30T16:52:25+00:00	2022-12-27T05:00:00+00:00	2022-12-30T16:50:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000719_001	Dismissed	Planned	Withdrawal unavailability	2022-12-23T12:27:55+00:00	2022-12-27T05:00:00+00:00	2022-12-30T18:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000717_002	Inactive	Unplanned	Withdrawal unavailability	2022-12-23T12:14:34+00:00	2022-12-22T20:10:00+00:00	2022-12-23T12:00:00+00:00	GWh/d	121.5	220.8	342.3	Failure	Prod Train 2	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000717_001	Dismissed	Unplanned	Withdrawal unavailability	2022-12-22T20:14:18+00:00	2022-12-22T20:10:00+00:00	2022-12-23T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Failure	Prod Train 2	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000716_001	Inactive	Unplanned	Withdrawal unavailability	2022-12-22T15:53:17+00:00	2022-12-08T14:07:00+00:00	2022-12-08T16:15:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000715_001	Inactive	Unplanned	Injection unavailability	2022-12-22T15:50:55+00:00	2022-12-08T14:07:00+00:00	2022-12-08T16:15:00+00:00	GWh/d	311.56	0	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000712_002	Inactive	Unplanned	Withdrawal unavailability	2022-12-16T00:50:32+00:00	2022-12-16T00:37:00+00:00	2022-12-16T00:52:00+00:00	GWh/d	342.3	0	342.3	Failure	Plant Trip	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000712_001	Dismissed	Unplanned	Withdrawal unavailability	2022-12-16T00:39:01+00:00	2022-12-16T00:37:00+00:00	2022-12-16T01:30:00+00:00	GWh/d	342.3	0	342.3	Failure	Plant Trip	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000701_004	Inactive	Unplanned	Storage unavailability	2022-12-12T00:17:37+00:00	2022-11-07T10:00:00+00:00	2022-12-11T23:10:00+00:00	TWh	0.42	2.8817895	3.3017895	Failure	Ald 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000701_003	Dismissed	Unplanned	Storage unavailability	2022-12-11T22:59:24+00:00	2022-11-07T10:00:00+00:00	2022-12-11T23:10:00+00:00	TWh	0.42	2.8817895	3.3017895	Failure	Ald 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000701_002	Dismissed	Unplanned	Storage unavailability	2022-11-21T08:52:27+00:00	2022-11-07T10:00:00+00:00	2022-12-21T18:00:00+00:00	TWh	0.42	2.8817895	3.3017895	Failure	Ald 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000701_001	Dismissed	Unplanned	Storage unavailability	2022-11-07T10:52:38+00:00	2022-11-07T10:00:00+00:00	2022-11-28T05:00:00+00:00	TWh	0.42	2.8817895	3.3017895	Failure	Ald 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000706_003	Inactive	Planned	Storage unavailability	2022-12-02T14:52:18+00:00	2022-11-27T05:00:00+00:00	2022-12-02T15:00:00+00:00	TWh	0.41	2.8917895	3.3017895	Planned Outage	Wellhead maintenance	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000706_002	Dismissed	Planned	Storage unavailability	2022-12-01T15:24:20+00:00	2022-11-27T05:00:00+00:00	2022-12-02T18:00:00+00:00	TWh	0.41	2.8917895	3.3017895	Planned Outage	Wellhead maintenance	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000706_001	Dismissed	Planned	Storage unavailability	2022-11-23T15:21:57+00:00	2022-11-27T05:00:00+00:00	2022-12-01T18:00:00+00:00	TWh	0.41	2.8917895	3.3017895	Planned Outage	Wellhead maintenance	21YGB-UKGASGRIDW	55WALDBOROUGH00H	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_000000000000000000704_002	Inactive	Planned	Injection unavailability	2022-11-19T09:18:39+00:00	2022-11-19T07:30:00+00:00	2022-11-19T09:15:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	Compressor 2 drying run	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000704_001	Dismissed	Planned	Injection unavailability	2022-11-18T18:59:11+00:00	2022-11-19T07:30:00+00:00	2022-11-19T11:30:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	Compressor 2 drying run	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000705_002	Inactive	Planned	Withdrawal unavailability	2022-11-19T09:18:15+00:00	2022-11-19T07:30:00+00:00	2022-11-19T09:15:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	Compressor 2 drying run	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.