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
< 3 4 5 6 7 >
Atwick	ATW_000000000000000000572_002	Dismissed	Planned	Storage unavailability	2021-04-26T09:02:05+01:00	2021-04-20T06:00:00+01:00	2021-04-28T13:00:00+01:00	TWh	0.459452982	2.873066418	3.3325194	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000572_005	Inactive	Planned	Storage unavailability	2021-04-29T07:58:03+01:00	2021-04-20T06:00:00+01:00	2021-04-29T07:58:00+01:00	TWh	0.459452982	2.41356386	3.3325194	Planned Outage	Cavity 6 (0.459452982 capacity)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000572_004	Dismissed	Planned	Storage unavailability	2021-04-29T05:53:22+01:00	2021-04-20T06:00:00+01:00	2021-04-29T08:00:00+01:00	TWh	0.459452982	2.41356386	3.3325194	Planned Outage	Cavity 6 (0.459452982 capacity)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000572_003	Dismissed	Planned	Storage unavailability	2021-04-28T10:40:29+01:00	2021-04-20T06:00:00+01:00	2021-04-29T08:00:00+01:00	TWh	0.459452982	2.873066418	3.3325194	Planned Outage	Cavity 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000579_004	Inactive	Unplanned	Storage unavailability	2021-04-29T13:58:35+01:00	2021-04-29T05:42:00+01:00	2021-04-29T13:58:00+01:00	TWh	0.459502528	2.873066388	3.3325194	Failure	Cavity 8 (0.459502528 capacity)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000579_003	Dismissed	Unplanned	Storage unavailability	2021-04-29T08:01:12+01:00	2021-04-29T05:42:00+01:00	2021-04-29T16:00:00+01:00	TWh	0.459502528	2.873066388	3.3325194	Failure	Cavity 8 (0.459502528 capacity)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000579_002	Dismissed	Unplanned	Storage unavailability	2021-04-29T05:52:18+01:00	2021-04-29T05:42:00+01:00	2021-04-29T16:00:00+01:00	TWh	0.459502528	2.41356386	3.3325194	Failure	Cavity 8 (0.459502528 capacity)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000579_001	Dismissed	Unplanned	Storage unavailability	2021-04-29T05:49:02+01:00	2021-04-29T05:42:00+01:00	2021-04-29T16:00:00+01:00	TWh	0.459502528	2.873016872	3.3325194	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000570_002	Dismissed	Planned	Withdrawal unavailability	2021-04-07T20:58:51+01:00	2021-04-07T20:20:00+01:00	2021-04-30T18:00:00+01:00	GWh/d	50	80	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000570_001	Dismissed	Planned	Withdrawal unavailability	2021-04-07T20:43:59+01:00	2021-04-07T20:20:00+01:00	2021-04-30T18:00:00+01:00	GWh/d	42	88	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000573_001	Dismissed	Planned	Storage unavailability	2021-04-14T13:37:19+01:00	2021-04-27T06:00:00+01:00	2021-04-30T18:00:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000573_003	Dismissed	Planned	Storage unavailability	2021-04-26T15:27:52+01:00	2021-04-28T14:00:00+01:00	2021-05-02T18:00:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000573_002	Dismissed	Planned	Storage unavailability	2021-04-26T09:03:06+01:00	2021-04-28T14:00:00+01:00	2021-05-02T18:00:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000580_002	Inactive	Unplanned	Withdrawal unavailability	2021-05-06T15:02:32+01:00	2021-05-04T13:30:00+01:00	2021-05-06T15:00:00+01:00	GWh/d	75	55	130	Failure	Vortisep Methanol Pumps failed x2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000580_001	Dismissed	Unplanned	Withdrawal unavailability	2021-05-04T13:48:45+01:00	2021-05-04T13:30:00+01:00	2021-05-07T18:00:00+01:00	GWh/d	75	55	130	Failure	Vortisep Methanol Pumps failed x2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000460_006	Inactive	Planned	Withdrawal unavailability	2021-05-08T06:01:53+01:00	2021-04-29T13:00:00+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
Aldbrough	ALD_000000000000000000460_005	Dismissed	Planned	Withdrawal unavailability	2021-04-29T12:14:48+01:00	2021-04-29T13:00:00+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
Aldbrough	ALD_000000000000000000460_004	Dismissed	Planned	Withdrawal unavailability	2021-03-12T10:30:05+00:00	2021-05-01T05:00:00+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
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
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
Atwick	ATW_000000000000000000584_002	Inactive	Unplanned	Storage unavailability	2021-05-11T17:44:38+01:00	2021-05-11T11:30:00+01:00	2021-05-11T17:30:00+01:00	TWh	0.4595	2.8730194	3.3325194	Failure	Methanol pump failure. Cavity unavailable for withdrawal.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000584_001	Dismissed	Unplanned	Storage unavailability	2021-05-11T11:46:57+01:00	2021-05-11T11:30:00+01:00	2021-05-12T16:00:00+01:00	TWh	0.4595	2.8730194	3.3325194	Failure	Methanol pump failure. Cavity unavailable for withdrawal.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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_000000000000000000458_004	Inactive	Planned	Injection unavailability	2021-05-16T17:52:10+01:00	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_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_000000000000000000585_002	Inactive	Unplanned	Withdrawal unavailability	2021-05-17T05:40:28+01:00	2021-05-16T18:00:00+01:00	2021-05-17T06:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 1 Leak test.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000585_001	Dismissed	Unplanned	Withdrawal unavailability	2021-05-16T17:58:28+01:00	2021-05-16T18:00:00+01:00	2021-05-17T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Failure	Train 1 Leak test.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000586_001	Dismissed	Unplanned	Withdrawal unavailability	2021-05-17T17:24:59+01:00	2021-05-17T17:01:00+01:00	2021-05-18T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000586_003	Inactive	Unplanned	Withdrawal unavailability	2021-05-19T11:34:23+01:00	2021-05-17T17:01:00+01:00	2021-05-19T11:35:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000586_002	Dismissed	Unplanned	Withdrawal unavailability	2021-05-18T17:07:23+01:00	2021-05-17T17:01:00+01:00	2021-05-19T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned 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_000000000000000000458_002	Dismissed	Planned	Injection unavailability	2020-07-11T13:43:50+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000458_001	Dismissed	Planned	Injection unavailability	2020-07-11T13:34:55+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000460_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T13:51:55+01:00	2021-05-06T05:00:00+01:00	2021-05-20T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Prod Train 1 Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000457_002	Dismissed	Planned	Injection unavailability	2020-07-11T13:31:39+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000457_001	Dismissed	Planned	Storage unavailability	2020-07-11T13:21:51+01:00	2021-05-08T05:00:00+01:00	2021-05-20T18:00:00+01:00	TWh	2.3352656	0	2.3352656	Planned Outage		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_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_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_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_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
Atwick	ATW_000000000000000000581_002	Dismissed	Planned	Storage unavailability	2021-05-27T16:14:36+01:00	2021-05-24T05:00:00+01:00	2021-05-27T16:20:00+01:00	TWh	0.459502528	2.873016872	3.3325194	Planned Outage	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000581_001	Dismissed	Planned	Storage unavailability	2021-05-05T15:54:24+01:00	2021-05-24T05:00:00+01:00	2021-05-27T18:00:00+01:00	TWh	0.459502528	2.873016872	3.3325194	Planned Outage	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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_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_000000000000000000567_001	Dismissed	Planned	Injection unavailability	2021-03-12T10:41:54+00:00	2021-05-16T18:00:00+01:00	2021-05-28T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Outage to cover ASV and NRV works.	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.