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
< 1 2 3 4 5 >
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_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_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_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
Aldbrough	ALD_000000000000000000705_001	Dismissed	Planned	Withdrawal unavailability	2022-11-18T19:00:18+00:00	2022-11-19T07:30:00+00:00	2022-11-19T11:30:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	Compressor 2 drying run	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000703_002	Dismissed	Planned	Withdrawal unavailability	2022-11-18T13:52:20+00:00	2022-11-18T14:00:00+00:00	2022-11-18T18:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	COMP 2 DRYING RUN	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000703_001	Dismissed	Planned	Withdrawal unavailability	2022-11-17T17:03:31+00:00	2022-11-18T14:00:00+00:00	2022-11-18T18:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	COMP 2 DRYING RUN	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_000000000000000000671_002	Inactive	Planned	Withdrawal unavailability	2022-05-31T17:01:53+01:00	2022-05-31T08:00:00+01:00	2022-05-31T16:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000671_001	Dismissed	Planned	Withdrawal unavailability	2022-05-25T16:31:27+01:00	2022-05-31T08:00:00+01:00	2022-05-31T16:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000466_003	Inactive	Planned	Withdrawal unavailability	2022-05-21T16:28:12+01:00	2022-05-08T05:00:00+01:00	2022-05-21T16:30:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000466_002	Dismissed	Planned	Withdrawal unavailability	2021-10-06T22:32:46+01:00	2022-05-08T05:00:00+01:00	2022-05-21T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000466_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T15:43:18+01:00	2022-05-08T05:00:00+01:00	2022-05-20T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	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_000000000000000000656_002	Inactive	Planned	Withdrawal unavailability	2022-03-24T09:18:04+00:00	2022-03-24T05:00:00+00:00	2022-03-24T09:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	132KV Switchover	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000656_001	Dismissed	Planned	Withdrawal unavailability	2022-03-16T14:47:31+00:00	2022-03-24T05:00:00+00:00	2022-03-24T09:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	132KV Switchover	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000654_002	Inactive	Unplanned	Withdrawal unavailability	2022-03-07T08:23:05+00:00	2022-03-07T05:35:00+00:00	2022-03-07T08:15:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000654_001	Dismissed	Unplanned	Withdrawal unavailability	2022-03-07T05:36:31+00:00	2022-03-07T05:35:00+00:00	2022-03-07T10:00:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000633_003	Inactive	Unplanned	Withdrawal unavailability	2022-01-10T16:23:04+00:00	2022-01-10T06:30:00+00:00	2022-01-10T16:23:00+00:00	GWh/d	342.3	0	342.3	Failure	Power Loss - Full Site/ Loss of nitrogen unit due to powerloss	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000633_002	Dismissed	Unplanned	Withdrawal unavailability	2022-01-10T11:20:31+00:00	2022-01-10T06:30:00+00:00	2022-01-10T20:00:00+00:00	GWh/d	342.3	0	342.3	Failure	Power Loss - Full Site/ Loss of nitrogen unit due to powerloss	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000633_001	Dismissed	Unplanned	Withdrawal unavailability	2022-01-10T06:44:48+00:00	2022-01-10T06:30:00+00:00	2022-01-10T12:00:00+00:00	GWh/d	342.3	0	342.3	Failure	Power Loss - Full Site	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000629_001	Dismissed	Unplanned	Withdrawal unavailability	2021-12-19T20:40:49+00:00	2021-12-19T20:30:00+00:00	2021-12-20T12:00:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000624_002	Inactive	Planned	Withdrawal unavailability	2021-12-14T17:01:53+00:00	2021-12-14T08:00:00+00:00	2021-12-14T16:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	PCS Upgrade	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000624_001	Dismissed	Planned	Withdrawal unavailability	2021-12-08T14:08:03+00:00	2021-12-14T08:00:00+00:00	2021-12-14T16:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	PCS Upgrade	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000608_003	Inactive	Unplanned	Withdrawal unavailability	2021-09-11T22:01:27+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000608_002	Dismissed	Unplanned	Withdrawal unavailability	2021-09-11T20:46:42+01:00	2021-09-11T17:03:00+01:00	2021-09-11T22:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000608_001	Dismissed	Unplanned	Withdrawal unavailability	2021-09-11T17:07:42+01:00	2021-09-11T17:03:00+01:00	2021-09-11T21:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000603_003	Inactive	Unplanned	Withdrawal unavailability	2021-08-09T18:07:25+01:00	2021-08-09T10:31:00+01:00	2021-08-09T18:08:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000603_002	Dismissed	Unplanned	Withdrawal unavailability	2021-08-09T15:57:30+01:00	2021-08-09T10:31:00+01:00	2021-08-09T20:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000603_001	Dismissed	Unplanned	Withdrawal unavailability	2021-08-09T10:43:18+01:00	2021-08-09T10:31:00+01:00	2021-08-09T16:00:00+01:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000564_003	Inactive	Planned	Withdrawal unavailability	2021-05-28T16:31:52+01:00	2021-05-28T09:00:00+01:00	2021-05-28T15:30:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000564_002	Dismissed	Planned	Withdrawal unavailability	2021-05-28T12:12:44+01:00	2021-05-28T09:00:00+01:00	2021-05-28T15:30:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000564_001	Dismissed	Planned	Withdrawal unavailability	2021-03-04T13:30:12+00:00	2021-05-28T09:00:00+01:00	2021-05-28T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000563_002	Dismissed	Planned	Withdrawal unavailability	2021-05-27T08:00:28+01:00	2021-05-27T09:00:00+01:00	2021-05-27T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Not now required for National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000563_001	Dismissed	Planned	Withdrawal unavailability	2021-03-04T13:29:04+00:00	2021-05-27T09:00:00+01:00	2021-05-27T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000562_002	Inactive	Planned	Withdrawal unavailability	2021-05-26T13:52:47+01:00	2021-05-26T09:00:00+01:00	2021-05-26T13:55:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For national Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000562_001	Dismissed	Planned	Withdrawal unavailability	2021-03-04T13:27:41+00:00	2021-05-26T09:00:00+01:00	2021-05-26T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For national Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000561_003	Inactive	Planned	Withdrawal unavailability	2021-05-24T14:48:45+01:00	2021-05-24T09:00:00+01:00	2021-05-24T15:50:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000561_002	Dismissed	Planned	Withdrawal unavailability	2021-05-24T14:22:42+01:00	2021-05-24T09:00:00+01:00	2021-05-24T15:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000561_001	Dismissed	Planned	Withdrawal unavailability	2021-03-04T13:24:46+00:00	2021-05-24T09:00:00+01:00	2021-05-24T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	For National Grid Requirements	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000459_003	Inactive	Planned	Withdrawal unavailability	2021-05-16T17:52:34+01:00	2021-05-08T05:00:00+01:00	2021-05-16T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000459_002	Dismissed	Planned	Withdrawal unavailability	2020-11-27T11:57:46+00:00	2021-05-08T05:00:00+01:00	2021-05-16T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000459_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T13:46:23+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000909_001	Active	Planned	Injection unavailability	2024-04-17T14:43:14+01:00	2024-06-05T10:00:00+01:00	2024-06-05T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	A4z software download	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.