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

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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 >
Atwick	ATW_000000000000000000518_001	Dismissed	Planned	Storage unavailability	2020-10-26T17:14:00+00:00	2020-10-27T07:00:00+00:00	2020-10-27T19:00:00+00:00	TWh	0.85813	2.2817514	3.1398814	Planned Outage	Cavity Maintenance (alongside existing REMIT notice)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000517_002	Inactive	Unplanned	Injection unavailability	2020-10-27T10:46:06+00:00	2020-10-26T09:20:00+00:00	2020-10-27T10:45:00+00:00	GWh/d	100.27	211.29	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000518_002	Inactive	Planned	Storage unavailability	2020-10-27T17:45:00+00:00	2020-10-27T07:00:00+00:00	2020-10-27T17:40:00+00:00	TWh	0.85813	2.2817514	3.1398814	Planned Outage	Cavity Maintenance (alongside existing REMIT notice)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000515_002	Dismissed	Planned	Storage unavailability	2020-10-29T13:50:12+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
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
Aldbrough	ALD_000000000000000000519_001	Dismissed	Unplanned	Injection unavailability	2020-10-31T05:53:15+00:00	2020-10-31T05:35:00+00:00	2020-10-31T12:00:00+00:00	GWh/d	211.29	100.27	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000519_002	Inactive	Unplanned	Injection unavailability	2020-10-31T08:24:37+00:00	2020-10-31T05:35:00+00:00	2020-10-31T08:25:00+00:00	GWh/d	211.29	100.27	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000516_002	Inactive	Planned	Withdrawal unavailability	2020-11-02T07:59:35+00:00	2020-10-23T11:00:00+01:00	2020-11-02T08:00:00+00:00	GWh/d	97.44	32.56	130	Planned Outage	Planned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000433_002	Dismissed	Planned	Injection unavailability	2020-11-04T15:54:43+00:00	2020-10-26T05:00:00+00:00	2020-11-10T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Extended maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000520_001	Dismissed	Unplanned	Withdrawal unavailability	2020-11-05T02:10:29+00:00	2020-11-05T00:45:00+00:00	2020-11-05T10:00:00+00:00	GWh/d	121.5	220.8	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000520_002	Inactive	Unplanned	Withdrawal unavailability	2020-11-05T11:01:54+00:00	2020-11-05T00:45:00+00:00	2020-11-05T10:00:00+00:00	GWh/d	121.5	220.8	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000510_005	Dismissed	Planned	Withdrawal unavailability	2020-11-05T16:38:07+00:00	2020-11-02T08:00:00+00:00	2020-11-12T18:00:00+00:00	GWh/d	73.08	56.92	130	Planned Outage	Commissioning runs, so output may vary.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000521_001	Dismissed	Unplanned	Injection unavailability	2020-11-09T08:28:20+00:00	2020-11-09T08:18:00+00:00	2020-11-11T18:00:00+00:00	GWh/d	30	0	30	Failure	Failure	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000434_002	Inactive	Planned	Injection unavailability	2020-11-09T17:57:46+00:00	2020-11-09T06:00:00+00:00	2020-11-09T17:58:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000433_003	Dismissed	Planned	Injection unavailability	2020-11-10T15:12:22+00:00	2020-10-26T05:00:00+00:00	2020-11-12T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Further extension to maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000521_002	Inactive	Unplanned	Injection unavailability	2020-11-11T17:19:32+00:00	2020-11-09T08:18:00+00:00	2020-11-11T17:20:00+00:00	GWh/d	30	0	30	Failure	Failure	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000433_004	Inactive	Planned	Injection unavailability	2020-11-12T12:58:15+00:00	2020-10-26T05:00:00+00:00	2020-11-12T13:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Further extension to maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000510_006	Dismissed	Planned	Withdrawal unavailability	2020-11-12T13:28:06+00:00	2020-11-02T08:00:00+00:00	2020-11-13T12:00:00+00:00	GWh/d	73.08	56.92	130	Planned Outage	Commissioning runs, so output may vary.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000510_007	Dismissed	Planned	Withdrawal unavailability	2020-11-13T11:40:35+00:00	2020-11-02T08:00:00+00:00	2020-11-13T11:40:00+00:00	GWh/d	73.08	56.92	130	Planned Outage	Commissioning runs, so output may vary.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000522_001	Dismissed	Planned	Injection unavailability	2020-11-17T18:10:21+00:00	2020-11-17T18:00:00+00:00	2020-11-18T00:00:00+00:00	GWh/d	111.2	200.36	311.56	Planned Outage	Extension to maintenance	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000431_002	Inactive	Planned	Injection unavailability	2020-11-17T19:01:52+00:00	2020-11-10T05:00:00+00:00	2020-11-17T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000522_002	Dismissed	Planned	Injection unavailability	2020-11-17T19:31:21+00:00	2020-11-17T18:00:00+00:00	2020-11-18T12:00:00+00:00	GWh/d	111.2	200.36	311.56	Planned Outage	Extension to maintenance	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000522_003	Inactive	Planned	Injection unavailability	2020-11-18T12:00:50+00:00	2020-11-17T18:00:00+00:00	2020-11-18T12:00:00+00:00	GWh/d	111.2	200.36	311.56	Planned Outage	Extension to maintenance	21YGB-UKGASGRIDW	55WALDBOROUGH00H	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_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_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_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_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_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_000000000000000000528_001	Dismissed	Unplanned	Withdrawal unavailability	2020-11-27T09:39:49+00:00	2020-11-27T09:38:00+00:00	2020-11-27T12:00:00+00:00	GWh/d	14	116	130	Failure	Unable to run export plant at max flows due too high grid pressure.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000528_002	Inactive	Unplanned	Withdrawal unavailability	2020-11-27T11:04:54+00:00	2020-11-27T09:38:00+00:00	2020-11-27T11:00:00+00:00	GWh/d	0	130	130	Failure	Unable to run export plant at max flows due too high grid pressure.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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_000000000000000000458_003	Dismissed	Planned	Injection unavailability	2020-11-27T11:58:26+00:00	2021-05-08T05:00:00+01:00	2021-05-16T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000460_002	Dismissed	Planned	Withdrawal unavailability	2020-11-27T12:01:09+00:00	2021-05-02T05:00:00+01:00	2021-05-08T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage. Then into main site outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000462_002	Dismissed	Planned	Injection unavailability	2020-11-27T12:04:39+00:00	2021-10-16T05:00:00+01:00	2021-10-22T05:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 1 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000464_002	Dismissed	Planned	Injection unavailability	2020-11-27T12:05:43+00:00	2021-10-25T05:00:00+01:00	2021-10-31T05:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 3 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000463_002	Dismissed	Planned	Injection unavailability	2020-11-27T12:06:54+00:00	2021-11-01T05:00:00+00:00	2021-11-13T05:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	Comp 2 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000529_001	Dismissed	Planned	Injection unavailability	2020-11-27T13:51:59+00:00	2021-10-30T05:00:00+01:00	2021-10-30T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Gas Compressor 1 Siemens maintenance	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000530_001	Dismissed	Unplanned	Withdrawal unavailability	2020-11-28T14:51:54+00:00	2020-11-28T14:00:00+00:00	2020-11-28T17:00:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000530_002	Inactive	Unplanned	Withdrawal unavailability	2020-11-28T16:34:40+00:00	2020-11-28T14:00:00+00:00	2020-11-28T16:30:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000531_001	Dismissed	Unplanned	Injection unavailability	2020-11-29T20:26:18+00:00	2020-11-29T19:30:00+00:00	2020-11-30T12:00:00+00:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000531_002	Dismissed	Unplanned	Injection unavailability	2020-11-29T22:53:18+00:00	2020-11-29T19:30:00+00:00	2020-11-29T22:50:00+00:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000460_003	Dismissed	Planned	Withdrawal unavailability	2020-12-01T10:21:49+00:00	2021-05-02T05:00:00+01:00	2021-05-08T05:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage. Then into main site outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000532_001	Dismissed	Planned	Injection unavailability	2020-12-03T11:30:17+00:00	2021-01-24T05:00:00+00:00	2021-01-30T18:00:00+00:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000533_001	Dismissed	Planned	Withdrawal unavailability	2020-12-03T11:34:00+00:00	2021-01-24T05:00:00+00:00	2021-01-30T18:00:00+00:00	GWh/d	32.4	97.6	130	Planned Outage	Compressor Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000532_002	Dismissed	Planned	Injection unavailability	2020-12-03T11:34:33+00:00	2021-01-24T05:00:00+00:00	2021-01-30T18:00:00+00:00	GWh/d	30	0	30	Planned Outage	Compressor outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000534_001	Dismissed	Unplanned	Withdrawal unavailability	2020-12-06T21:55:03+00:00	2020-12-06T21:54:00+00:00	2020-12-06T23:30:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000534_002	Inactive	Unplanned	Withdrawal unavailability	2020-12-06T23:18:37+00:00	2020-12-06T21:54:00+00:00	2020-12-06T23:16:00+00:00	GWh/d	342.3	0	342.3	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000535_001	Dismissed	Unplanned	Injection unavailability	2020-12-07T16:10:31+00:00	2020-12-07T16:10:00+00:00	2020-12-08T16:10:00+00:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	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

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.