Last update at: 2024-04-18T16:00:00+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
< 5 6 7 8 9 >
Atwick	ATW_000000000000000000748_001	Active	Planned	Withdrawal unavailability	2023-04-27T08:09:23+01:00	2026-07-01T05:00:00+01:00	2026-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage	Annual Full Site Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000747_001	Active	Planned	Injection unavailability	2023-04-27T08:07:00+01:00	2025-07-01T05:00:00+01:00	2025-07-15T05:00:00+01:00	GWh/d	30	0	30	Planned Outage	Annual Full Site outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000746_001	Active	Planned	Withdrawal unavailability	2023-04-27T08:04:47+01:00	2025-07-01T05:00:00+01:00	2025-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage	Annual Full site Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000741_002	Inactive	Planned	Storage unavailability	2023-04-26T19:02:32+01:00	2023-04-17T05:00:00+01:00	2023-04-26T18:00:00+01:00	TWh	1.29	2.0117895	3.3017895	Planned Outage	Ald 1 Maintenance and Sonar Survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000741_001	Dismissed	Planned	Storage unavailability	2023-04-14T13:03:53+01:00	2023-04-17T05:00:00+01:00	2023-04-26T18:00:00+01:00	TWh	1.29	2.0117895	3.3017895	Planned Outage	Ald 1 Maintenance and Sonar Survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000744_002	Inactive	Planned	Injection unavailability	2023-04-26T15:02:32+01:00	2023-04-26T10:00:00+01:00	2023-04-26T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000745_002	Inactive	Planned	Withdrawal unavailability	2023-04-26T15:02:32+01:00	2023-04-26T10:00:00+01:00	2023-04-26T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000745_001	Dismissed	Planned	Withdrawal unavailability	2023-04-24T15:08:22+01:00	2023-04-26T10:00:00+01:00	2023-04-26T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000744_001	Dismissed	Planned	Injection unavailability	2023-04-24T15:07:12+01:00	2023-04-26T10:00:00+01:00	2023-04-26T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Testing	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000734_007	Inactive	Planned	Injection unavailability	2023-03-31T11:56:18+01:00	2023-03-30T08:00:00+01:00	2023-03-31T11:55:00+01:00	GWh/d	30	0	30	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000734_006	Dismissed	Planned	Injection unavailability	2023-03-30T18:03:45+01:00	2023-03-30T08:00:00+01:00	2023-03-31T16:00:00+01:00	GWh/d	30	0	30	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000734_005	Dismissed	Planned	Injection unavailability	2023-03-30T17:00:06+01:00	2023-03-30T08:00:00+01:00	2023-03-30T19:00:00+01:00	GWh/d	22.5	7.5	30	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000734_004	Dismissed	Planned	Injection unavailability	2023-03-30T14:58:51+01:00	2023-03-30T08:00:00+01:00	2023-03-30T17:00:00+01:00	GWh/d	22.5	7.5	30	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000734_003	Dismissed	Planned	Injection unavailability	2023-03-30T13:00:53+01:00	2023-03-30T08:00:00+01:00	2023-03-30T16:00:00+01:00	GWh/d	22.5	7.5	30	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000734_002	Dismissed	Planned	Injection unavailability	2023-03-24T15:02:36+00:00	2023-03-30T08:00:00+01:00	2023-03-30T16:00:00+01:00	GWh/d	30	0	30	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000734_001	Dismissed	Planned	Injection unavailability	2023-03-22T10:27:02+00:00	2023-03-29T08:00:00+01:00	2023-03-29T16:00:00+01:00	GWh/d	30	0	30	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000735_007	Inactive	Planned	Withdrawal unavailability	2023-03-31T11:55:42+01:00	2023-03-30T08:00:00+01:00	2023-03-31T11:55:00+01:00	GWh/d	130	0	130	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000735_006	Dismissed	Planned	Withdrawal unavailability	2023-03-30T18:03:03+01:00	2023-03-30T08:00:00+01:00	2023-03-31T16:00:00+01:00	GWh/d	130	0	130	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000735_005	Dismissed	Planned	Withdrawal unavailability	2023-03-30T17:00:26+01:00	2023-03-30T08:00:00+01:00	2023-03-30T19:00:00+01:00	GWh/d	120	10	130	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000735_004	Dismissed	Planned	Withdrawal unavailability	2023-03-30T14:58:30+01:00	2023-03-30T08:00:00+01:00	2023-03-30T17:00:00+01:00	GWh/d	120	10	130	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000735_003	Dismissed	Planned	Withdrawal unavailability	2023-03-30T13:01:55+01:00	2023-03-30T08:00:00+01:00	2023-03-30T16:00:00+01:00	GWh/d	120	10	130	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000735_002	Dismissed	Planned	Withdrawal unavailability	2023-03-24T15:02:51+00:00	2023-03-30T08:00:00+01:00	2023-03-30T16:00:00+01:00	GWh/d	130	0	130	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000735_001	Dismissed	Planned	Withdrawal unavailability	2023-03-22T10:28:36+00:00	2023-03-29T08:00:00+01:00	2023-03-29T16:00:00+01:00	GWh/d	130	0	130	Planned Outage	USM	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000737_003	Inactive	Planned	Storage unavailability	2023-03-29T13:02:32+01:00	2023-03-28T11:00:00+01:00	2023-03-29T12:00:00+01:00	TWh	0.75242	2.5493695	3.3017895	Planned Outage	Block placement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000737_002	Dismissed	Planned	Storage unavailability	2023-03-28T15:47:16+01:00	2023-03-28T11:00:00+01:00	2023-03-29T12:00:00+01:00	TWh	0.75242	2.5493695	3.3017895	Planned Outage	Block placement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000737_001	Dismissed	Planned	Storage unavailability	2023-03-24T13:08:51+00:00	2023-03-28T11:00:00+01:00	2023-03-28T19:00:00+01:00	TWh	0.75242	2.5493695	3.3017895	Planned Outage	Block placement	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000736_002	Dismissed	Planned	Withdrawal unavailability	2023-03-24T13:04:57+00:00	2023-03-28T11:00:00+01:00	2023-03-28T19:00:00+01:00	GWh/d	0.75242	341.54758	342.3	Planned Outage	Event type incorrect	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000736_001	Dismissed	Planned	Withdrawal unavailability	2023-03-24T12:47:44+00:00	2023-03-28T11:00:00+01:00	2023-03-28T19:00:00+01:00	GWh/d	0.75242	341.54758	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000733_002	Dismissed	Planned	Storage unavailability	2023-03-02T15:20:04+00:00	2024-03-01T06:00:00+00:00	2024-03-01T06:30:00+00:00	TWh	0.01	3.2917895	3.3017895	Planned Outage	Publication for test purpose only. No loss of availability.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000733_001	Dismissed	Planned	Storage unavailability	2023-03-02T15:17:22+00:00	2024-03-01T06:00:00+00:00	2024-03-01T06:30:00+00:00	TWh	0.01	3.2917895	3.3017895	Planned Outage	Publication for test purpose only. No loss of availability.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000730_002	Inactive	Planned	Withdrawal unavailability	2023-02-08T13:02:32+00:00	2023-02-08T10:00:00+00:00	2023-02-08T12:00:00+00:00	GWh/d	50	80	130	Planned Outage	Stream 7.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000730_001	Dismissed	Planned	Withdrawal unavailability	2023-02-02T09:11:40+00:00	2023-02-08T10:00:00+00:00	2023-02-08T12:00:00+00:00	GWh/d	50	80	130	Planned Outage	Stream 7.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000729_002	Inactive	Planned	Withdrawal unavailability	2023-02-06T15:45:38+00:00	2023-02-06T08:00:00+00:00	2023-02-06T15:42:00+00:00	GWh/d	50	80	130	Planned Outage	Stream 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000729_001	Dismissed	Planned	Withdrawal unavailability	2023-02-02T08:49:06+00:00	2023-02-06T08:00:00+00:00	2023-02-06T16:00:00+00:00	GWh/d	50	80	130	Planned Outage	Stream 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000724_002	Inactive	Planned	Storage unavailability	2023-01-27T18:55:31+00:00	2023-01-27T06:00:00+00:00	2023-01-27T18:55:00+00:00	TWh	0.665322552	2.803322148	3.4686447	Planned Outage	Cavity 5 Six Monthly Maintenace	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000724_001	Dismissed	Planned	Storage unavailability	2023-01-10T07:34:25+00:00	2023-01-27T06:00:00+00:00	2023-01-27T18:00:00+00:00	TWh	0.665322552	2.803322148	3.4686447	Planned Outage	Cavity 5 Six Monthly Maintenace	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000723_002	Inactive	Planned	Storage unavailability	2023-01-20T18:43:05+00:00	2023-01-20T06:00:00+00:00	2023-01-20T18:00:00+00:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 3 Six Monthly Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000723_001	Dismissed	Planned	Storage unavailability	2023-01-10T07:31:25+00:00	2023-01-20T06:00:00+00:00	2023-01-20T18:00:00+00:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 3 Six Monthly Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000722_002	Inactive	Planned	Storage unavailability	2023-01-19T19:02:32+00:00	2023-01-19T06:00:00+00:00	2023-01-19T18:00:00+00:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Six Monthly Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000722_001	Dismissed	Planned	Storage unavailability	2023-01-10T07:29:17+00:00	2023-01-19T06:00:00+00:00	2023-01-19T18:00:00+00:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Six Monthly Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000721_002	Inactive	Planned	Storage unavailability	2023-01-18T08:43:03+00:00	2023-01-18T06:00:00+00:00	2023-01-18T08:40:00+00:00	TWh	0.48312084	2.98552386	3.4686447	Planned Outage	Cavity 8 6 Six Monthly Maintenance.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000721_001	Dismissed	Planned	Storage unavailability	2023-01-10T07:25:16+00:00	2023-01-18T06:00:00+00:00	2023-01-18T18:00:00+00:00	TWh	0.48312084	2.98552386	3.4686447	Planned Outage	Cavity 8 6 Six Monthly Maintenance.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000720_002	Inactive	Planned	Withdrawal unavailability	2023-01-04T16:06:09+00:00	2023-01-04T08:00:00+00:00	2023-01-04T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production train 1, valve maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000720_001	Dismissed	Planned	Withdrawal unavailability	2023-01-03T13:31:11+00:00	2023-01-04T08:00:00+00:00	2023-01-04T16:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage	Production train 1, valve maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000718_002	Inactive	Planned	Withdrawal unavailability	2022-12-30T16:53:25+00:00	2022-12-27T05:00:00+00:00	2022-12-30T16:54:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000718_001	Dismissed	Planned	Withdrawal unavailability	2022-12-23T12:27:31+00:00	2022-12-27T05:00:00+00:00	2022-12-30T18:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000719_002	Inactive	Planned	Withdrawal unavailability	2022-12-30T16:52:25+00:00	2022-12-27T05:00:00+00:00	2022-12-30T16:50:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000719_001	Dismissed	Planned	Withdrawal unavailability	2022-12-23T12:27:55+00:00	2022-12-27T05:00:00+00:00	2022-12-30T18:00:00+00:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000714_002	Dismissed	Planned	Withdrawal unavailability	2022-12-19T17:43:20+00:00	2022-12-27T05:00:00+00:00	2022-12-31T18:00:00+00:00	GWh/d	100	30	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000714_001	Dismissed	Planned	Withdrawal unavailability	2022-12-16T14:09:39+00:00	2022-12-27T05:00:00+00:00	2022-12-31T18:00:00+00:00	GWh/d	100	30	130	Planned Outage		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.