Last update at: 2024-09-17T13:30:00+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_000000000000000000480_003	Dismissed	Planned	Withdrawal unavailability	2023-07-25T08:34:12+01:00	2024-05-12T05:00:00+01:00	2024-05-21T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000480_002	Dismissed	Planned	Withdrawal unavailability	2021-06-30T09:54:19+01:00	2024-05-12T05:00:00+01:00	2024-05-21T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000480_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T16:29:20+01:00	2024-05-12T05:00:00+01:00	2024-05-24T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000924_002	Dismissed	Unplanned	Injection unavailability	2024-05-22T09:29:47+01:00	2024-05-24T18:00:00+01:00	2024-05-26T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Comp 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000924_001	Dismissed	Unplanned	Injection unavailability	2024-05-21T14:43:53+01:00	2024-05-24T18:00:00+01:00	2024-05-26T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure	Comp 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000923_002	Inactive	Planned	Storage unavailability	2024-05-10T16:35:01+01:00	2024-05-07T09:00:00+01:00	2024-05-10T16:00:00+01:00	TWh	0.419	2.7431642	3.1621642	Planned Outage	A8 WHM	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000923_001	Dismissed	Planned	Storage unavailability	2024-05-07T08:48:52+01:00	2024-05-07T09:00:00+01:00	2024-05-10T18:00:00+01:00	TWh	0.419	2.7431642	3.1621642	Planned Outage	A8 WHM	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000922_002	Inactive	Planned	Storage unavailability	2024-04-30T13:18:52+01:00	2024-04-28T00:00:00+01:00	2024-04-30T13:15:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Ald 1 W/H Maint	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000922_001	Dismissed	Planned	Storage unavailability	2024-04-27T14:21:53+01:00	2024-04-28T00:00:00+01:00	2024-04-30T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Ald 1 W/H Maint	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000921_002	Inactive	Unplanned	Withdrawal unavailability	2024-04-26T16:12:27+01:00	2024-04-26T15:32:00+01:00	2024-04-26T16:11:00+01:00	GWh/d	121.5	220.8	342.3	Failure	PT2 Regen Cooler Fan B	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000921_001	Dismissed	Unplanned	Withdrawal unavailability	2024-04-26T15:33:01+01:00	2024-04-26T15:32:00+01:00	2024-05-01T16:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	PT2 Regen Cooler Fan B	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000914_002	Inactive	Planned	Withdrawal unavailability	2024-04-25T16:02:32+01:00	2024-04-25T10:00:00+01:00	2024-04-25T15:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	1ESD5110 Valve test Rescheduled	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000914_001	Dismissed	Planned	Withdrawal unavailability	2024-04-24T12:31:34+01:00	2024-04-25T10:00:00+01:00	2024-04-25T15:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	1ESD5110 Valve test Rescheduled	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000913_002	Inactive	Planned	Withdrawal unavailability	2024-04-24T12:24:59+01:00	2024-04-24T09:00:00+01:00	2024-04-24T12:25:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod T1 1MV5110 Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000913_001	Dismissed	Planned	Withdrawal unavailability	2024-04-23T17:05:38+01:00	2024-04-24T09:00:00+01:00	2024-04-24T13:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod T1 1MV5110 Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000906_006	Inactive	Unplanned	Withdrawal unavailability	2024-04-21T15:45:46+01:00	2024-04-11T00:30:00+01:00	2024-04-21T15:45:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000906_005	Dismissed	Unplanned	Withdrawal unavailability	2024-04-18T15:47:00+01:00	2024-04-11T00:30:00+01:00	2024-04-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000906_004	Dismissed	Unplanned	Withdrawal unavailability	2024-04-16T14:25:52+01:00	2024-04-11T00:30:00+01:00	2024-04-19T12:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000906_003	Dismissed	Unplanned	Withdrawal unavailability	2024-04-12T08:30:50+01:00	2024-04-11T00:30:00+01:00	2024-04-17T12:00:00+01:00	GWh/d	342.3	0	342.3	Failure	Train 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000906_002	Dismissed	Unplanned	Withdrawal unavailability	2024-04-11T01:06:57+01:00	2024-04-11T00:30:00+01:00	2024-04-12T12:00:00+01:00	GWh/d	342.3	0	342.3	Failure	Train 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000906_001	Dismissed	Unplanned	Withdrawal unavailability	2024-04-11T00:28:30+01:00	2024-04-11T00:30:00+01:00	2024-04-12T12:00:00+01:00	GWh/d	342.3	0	342.3	Failure	Train 1 unavailable	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
Aldbrough	ALD_000000000000000000904_003	Inactive	Planned	Withdrawal unavailability	2024-04-12T08:29:18+01:00	2024-04-09T12:00:00+01:00	2024-04-12T08:30:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	PT 1. Choke stack replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000904_002	Dismissed	Planned	Withdrawal unavailability	2024-04-10T16:19:29+01:00	2024-04-09T12:00:00+01:00	2024-04-12T12:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	PT 1. Choke stack replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000904_001	Dismissed	Planned	Withdrawal unavailability	2024-04-03T11:35:06+01:00	2024-04-09T12:00:00+01:00	2024-04-11T12:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	PT 1. Choke stack replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000902_002	Inactive	Planned	Injection unavailability	2024-04-03T15:02:32+01:00	2024-04-03T10:00:00+01:00	2024-04-03T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Software download.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000903_002	Inactive	Planned	Withdrawal unavailability	2024-04-03T15:02:32+01:00	2024-04-03T10:00:00+01:00	2024-04-03T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000903_001	Dismissed	Planned	Withdrawal unavailability	2024-03-28T15:27:28+00:00	2024-04-03T10:00:00+01:00	2024-04-03T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000902_001	Dismissed	Planned	Injection unavailability	2024-03-28T15:26:14+00:00	2024-04-03T10:00:00+01:00	2024-04-03T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Software download.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000899_002	Inactive	Unplanned	Injection unavailability	2024-03-27T16:02:47+00:00	2024-03-27T14:35:00+00:00	2024-03-27T16:00:00+00:00	GWh/d	311.56	0	311.56	Failure	ESD fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000899_001	Dismissed	Unplanned	Injection unavailability	2024-03-27T14:34:28+00:00	2024-03-27T14:35:00+00:00	2024-03-27T17:00:00+00:00	GWh/d	311.56	0	311.56	Failure	ESD fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000900_002	Inactive	Unplanned	Withdrawal unavailability	2024-03-27T16:02:31+00:00	2024-03-27T14:35:00+00:00	2024-03-27T16:00:00+00:00	GWh/d	342.3	0	342.3	Failure	ESD fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000900_001	Dismissed	Unplanned	Withdrawal unavailability	2024-03-27T14:35:37+00:00	2024-03-27T14:35:00+00:00	2024-03-27T17:00:00+00:00	GWh/d	342.3	0	342.3	Failure	ESD fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000894_002	Inactive	Planned	Injection unavailability	2024-03-27T15:02:31+00:00	2024-03-27T08:00:00+00:00	2024-03-27T14:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	Software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000895_002	Inactive	Planned	Withdrawal unavailability	2024-03-27T15:02:31+00:00	2024-03-27T08:00:00+00:00	2024-03-27T14:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	Software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000895_001	Dismissed	Planned	Withdrawal unavailability	2024-03-04T08:26:03+00:00	2024-03-27T08:00:00+00:00	2024-03-27T14:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	Software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000894_001	Dismissed	Planned	Injection unavailability	2024-03-04T08:24:29+00:00	2024-03-27T08:00:00+00:00	2024-03-27T14:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	Software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000893_002	Inactive	Unplanned	Injection unavailability	2024-02-26T18:27:54+00:00	2024-02-26T17:45:00+00:00	2024-02-26T18:30:00+00:00	GWh/d	111.02	200.54	311.56	Failure	Compressor 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000893_001	Dismissed	Unplanned	Injection unavailability	2024-02-26T17:45:57+00:00	2024-02-26T17:45:00+00:00	2024-02-26T22:00:00+00:00	GWh/d	111.02	200.54	311.56	Failure	Compressor 2 unavailable	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000892_002	Inactive	Planned	Injection unavailability	2024-02-14T18:16:49+00:00	2024-02-14T05:00:00+00:00	2024-02-14T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	GC-1 HP BD valve replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000892_001	Dismissed	Planned	Injection unavailability	2024-02-13T15:01:09+00:00	2024-02-14T05:00:00+00:00	2024-02-14T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	GC-1 HP BD valve replacement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000890_002	Inactive	Unplanned	Injection unavailability	2024-02-13T12:58:21+00:00	2024-02-13T06:30:00+00:00	2024-02-13T13:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Site Trip	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000890_001	Dismissed	Unplanned	Injection unavailability	2024-02-13T06:32:04+00:00	2024-02-13T06:30:00+00:00	2024-02-13T18:00:00+00:00	GWh/d	311.56	0	311.56	Failure	Site Trip	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000891_002	Inactive	Unplanned	Withdrawal unavailability	2024-02-13T11:56:38+00:00	2024-02-13T06:30:00+00:00	2024-02-13T11:59:00+00:00	GWh/d	342.3	0	342.3	Failure	Site Trip	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000891_001	Dismissed	Unplanned	Withdrawal unavailability	2024-02-13T06:33:25+00:00	2024-02-13T06:30:00+00:00	2024-02-13T18:00:00+00:00	GWh/d	342.3	0	342.3	Failure	Site Trip	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000887_002	Dismissed	Planned	Injection unavailability	2024-02-08T03:16:10+00:00	2024-02-08T05:00:00+00:00	2024-02-08T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	GC-2 blow down valve change.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000887_001	Dismissed	Planned	Injection unavailability	2024-02-07T09:56:35+00:00	2024-02-08T05:00:00+00:00	2024-02-08T18:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage	GC-2 blow down valve change.	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.