Last update at: 2024-05-14T13:30:00+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
< 5 6 7 8 9 >
Atwick	ATW_000000000000000000646_005	Inactive	Planned	Withdrawal unavailability	2022-02-12T15:03:33+00:00	2022-02-10T06:00:00+00:00	2022-02-12T15:03:00+00:00	GWh/d	110	20	130	Planned Outage	Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000646_004	Dismissed	Planned	Withdrawal unavailability	2022-02-11T15:14:21+00:00	2022-02-10T06:00:00+00:00	2022-02-12T16:00:00+00:00	GWh/d	110	20	130	Planned Outage	Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000646_003	Dismissed	Planned	Withdrawal unavailability	2022-02-10T16:21:34+00:00	2022-02-10T06:00:00+00:00	2022-02-11T18:00:00+00:00	GWh/d	110	20	130	Planned Outage	Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000646_002	Dismissed	Planned	Withdrawal unavailability	2022-02-10T14:01:39+00:00	2022-02-10T06:00:00+00:00	2022-02-11T18:00:00+00:00	GWh/d	100	30	130	Planned Outage	Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000646_001	Dismissed	Planned	Withdrawal unavailability	2022-02-07T14:33:55+00:00	2022-02-10T06:00:00+00:00	2022-02-11T18:00:00+00:00	GWh/d	110	20	130	Planned Outage	Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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
Atwick	ATW_000000000000000000590_002	Inactive	Unplanned	Injection unavailability	2021-06-30T07:46:01+01:00	2021-06-30T05:37:00+01:00	2021-06-30T07:40:00+01:00	GWh/d	7.5	22.5	30	Failure	No 3 Compressor.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000590_001	Dismissed	Unplanned	Injection unavailability	2021-06-30T05:38:17+01:00	2021-06-30T05:37:00+01:00	2021-06-30T12:00:00+01:00	GWh/d	7.5	22.5	30	Failure	No 3 Compressor.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000595_002	Inactive	Planned	Withdrawal unavailability	2021-09-09T10:34:17+01:00	2021-09-07T08:00:00+01:00	2021-09-09T10:33:00+01:00	GWh/d	130	0	130	Planned Outage	NG Requirement - Asset can Withdraw if required	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000595_001	Dismissed	Planned	Withdrawal unavailability	2021-07-26T15:29:54+01:00	2021-09-07T08:00:00+01:00	2021-09-09T16:00:00+01:00	GWh/d	130	0	130	Planned Outage	NG Requirement - Asset can Withdraw if required	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000630_003	Inactive	Unplanned	Storage unavailability	2021-12-22T16:02:07+00:00	2021-12-20T08:27:00+00:00	2021-12-22T16:01:00+00:00	TWh	0.400165903	2.456757	3.315481	Failure	Methanol injection issue at cavity.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000630_002	Dismissed	Unplanned	Storage unavailability	2021-12-21T14:37:24+00:00	2021-12-20T08:27:00+00:00	2021-12-22T18:00:00+00:00	TWh	0.400165903	2.456757	3.315481	Failure	Methanol injection issue at cavity.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000630_001	Dismissed	Unplanned	Storage unavailability	2021-12-20T08:45:47+00:00	2021-12-20T08:27:00+00:00	2021-12-21T16:00:00+00:00	TWh	0.400165903	2.456757	3.315481	Failure	Methanol injection issue at cavity.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000877_003	Inactive	Unplanned	Injection unavailability	2024-01-13T08:43:45+00:00	2024-01-12T15:31:00+00:00	2024-01-13T08:43:00+00:00	GWh/d	311.56	0	311.56	Failure	Loss of Injection due to loss of Alarms	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000877_002	Dismissed	Unplanned	Injection unavailability	2024-01-12T22:42:16+00:00	2024-01-12T15:31:00+00:00	2024-01-13T12:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Loss of Injection due to loss of Alarms	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000877_001	Dismissed	Unplanned	Injection unavailability	2024-01-12T15:34:23+00:00	2024-01-12T15:31:00+00:00	2024-01-12T23:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Loss of Injection due to loss of Alarms	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000835_002	Inactive	Unplanned	Storage unavailability	2023-11-04T10:39:24+00:00	2023-11-03T19:55:00+00:00	2023-11-04T10:35:00+00:00	TWh	0.41840879	2.74375541	3.1621642	Failure	Loss of ALD 8	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000835_001	Dismissed	Unplanned	Storage unavailability	2023-11-03T19:43:51+00:00	2023-11-03T19:55:00+00:00	2023-11-04T19:30:00+00:00	TWh	0.41840879	2.74375541	3.1621642	Failure	Loss of ALD 8	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000795_002	Dismissed	Unplanned	Storage unavailability	2024-02-01T12:36:36+00:00	2024-09-02T05:00:00+01:00	2024-10-11T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000795_001	Dismissed	Unplanned	Storage unavailability	2023-08-21T14:49:04+01:00	2024-09-02T05:00:00+01:00	2024-10-11T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_005	Inactive	Planned	Storage unavailability	2023-09-14T06:02:32+01:00	2023-09-12T06:00:00+01:00	2023-09-14T05:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3 WHM	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_004	Dismissed	Planned	Storage unavailability	2023-09-13T09:51:24+01:00	2023-09-12T06:00:00+01:00	2023-09-14T05:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3 WHM	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000752_003	Dismissed	Planned	Storage unavailability	2023-06-23T08:34:18+01:00	2023-08-06T05:00:00+01:00	2023-10-26T18:00:00+01:00	TWh	0.435	2.8667895	3.2992861	Planned Outage	Loss of ALD 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000752_002	Dismissed	Planned	Storage unavailability	2023-05-05T14:40:37+01:00	2023-08-06T05:00:00+01:00	2023-10-26T18:00:00+01:00	TWh	0.435	2.8667895	3.3017895	Planned Outage	Loss of ALD 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000752_001	Dismissed	Planned	Storage unavailability	2023-05-04T12:58:06+01:00	2023-08-06T05:00:00+01:00	2023-10-26T18:00:00+01:00	TWh	1.27032	2.0314695	3.3017895	Planned Outage	Loss of ALD 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_007	Active	Unplanned	Storage unavailability	2024-05-14T13:01:17+01:00	2024-03-30T05:00:00+00:00	2024-05-31T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_006	Dismissed	Unplanned	Storage unavailability	2024-04-25T15:49:39+01:00	2024-03-30T05:00:00+00:00	2024-06-08T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_005	Dismissed	Unplanned	Storage unavailability	2024-04-17T13:15:54+01:00	2024-03-30T05:00:00+00:00	2024-06-06T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_004	Dismissed	Unplanned	Storage unavailability	2024-03-08T09:56:28+00:00	2024-03-30T05:00:00+00:00	2024-05-07T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_003	Dismissed	Unplanned	Storage unavailability	2024-03-04T08:15:02+00:00	2024-03-25T05:00:00+00:00	2024-05-09T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_002	Dismissed	Unplanned	Storage unavailability	2024-02-01T12:41:10+00:00	2024-03-30T05:00:00+00:00	2024-05-07T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_001	Dismissed	Unplanned	Storage unavailability	2023-08-21T14:43:47+01:00	2024-05-02T05:00:00+01:00	2024-06-11T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_003	Dismissed	Planned	Storage unavailability	2023-08-30T15:28:22+01:00	2023-09-12T06:00:00+01:00	2023-09-22T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_002	Dismissed	Planned	Storage unavailability	2023-08-23T09:12:19+01:00	2023-09-10T06:00:00+01:00	2023-09-22T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_001	Dismissed	Planned	Storage unavailability	2023-07-05T15:27:29+01:00	2023-09-12T06:00:00+01:00	2023-09-24T18:00:00+01:00	TWh	0.412	2.8872861	3.2992861	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000911_002	Inactive	Unplanned	Injection unavailability	2024-04-18T15:39:27+01:00	2024-04-15T13:20:00+01:00	2024-04-18T15:37:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Injection Comp 2 - 2nd Stage cooling failure. NG 908. rev 5702.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000911_001	Dismissed	Unplanned	Injection unavailability	2024-04-18T13:57:40+01:00	2024-04-15T13:20:00+01:00	2024-04-19T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Injection Comp 2 - 2nd Stage cooling failure. NG 908. rev 5702.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000908_002	Inactive	Unplanned	Injection unavailability	2024-04-18T13:02:32+01:00	2024-04-15T13:20:00+01:00	2024-04-18T12:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Injection Comp 2 - 2nd Stage cooling failure.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000908_001	Dismissed	Unplanned	Injection unavailability	2024-04-15T13:21:20+01:00	2024-04-15T13:20:00+01:00	2024-04-18T12:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Injection Comp 2 - 2nd Stage cooling failure.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000803_002	Inactive	Planned	Injection unavailability	2023-10-10T15:41:40+01:00	2023-10-10T08:00:00+01:00	2023-10-10T15:41:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 2)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000803_001	Dismissed	Planned	Injection unavailability	2023-09-05T09:57:41+01:00	2023-10-10T08:00:00+01:00	2023-10-10T17:00:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 2)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000801_002	Inactive	Planned	Injection unavailability	2023-10-09T16:27:06+01:00	2023-10-09T08:00:00+01:00	2023-10-09T16:25:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 1)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000801_001	Dismissed	Planned	Injection unavailability	2023-09-05T09:53:56+01:00	2023-10-09T08:00:00+01:00	2023-10-09T17:00:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 1)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000868_002	Inactive	Unplanned	Withdrawal unavailability	2023-12-13T20:12:19+00:00	2023-12-13T19:32:00+00:00	2023-12-13T20:10:00+00:00	GWh/d	342.3	0	342.3	Failure	Hot Water Heater issues	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000868_001	Dismissed	Unplanned	Withdrawal unavailability	2023-12-13T19:34:41+00:00	2023-12-13T19:32:00+00:00	2023-12-13T22:00:00+00:00	GWh/d	342.3	0	342.3	Failure	Hot Water Heater issues	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000807_003	Inactive	Unplanned	Withdrawal unavailability	2023-09-09T11:43:54+01:00	2023-09-08T19:20:00+01:00	2023-09-09T11:45:00+01:00	GWh/d	342.3	0	342.3	Failure	HIPPS Failure	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000807_002	Dismissed	Unplanned	Withdrawal unavailability	2023-09-08T22:03:47+01:00	2023-09-08T19:20:00+01:00	2023-09-09T17:00:00+01:00	GWh/d	342.3	0	342.3	Failure	HIPPS Failure	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000807_001	Dismissed	Unplanned	Withdrawal unavailability	2023-09-08T20:18:24+01:00	2023-09-08T19:20:00+01:00	2023-09-09T05:00:00+01:00	GWh/d	342.3	0	342.3	Failure	HIPPS Failure	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000806_003	Inactive	Unplanned	Injection unavailability	2023-09-09T11:43:38+01:00	2023-09-08T19:20:00+01:00	2023-09-09T11:45:00+01:00	GWh/d	311.56	0	311.56	Failure	HIPPS Failure	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000806_002	Dismissed	Unplanned	Injection unavailability	2023-09-08T22:03:00+01:00	2023-09-08T19:20:00+01:00	2023-09-09T17:00:00+01:00	GWh/d	311.56	0	311.56	Failure	HIPPS Failure	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.