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 >
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
Atwick	ATW_000000000000000000760_004	Inactive	Planned	Storage unavailability	2023-06-21T11:16:09+01:00	2023-06-02T09:00:00+01:00	2023-06-21T11:15:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Wellhead maintenance and intervention works.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000760_003	Dismissed	Planned	Storage unavailability	2023-06-20T17:32:54+01:00	2023-06-02T09:00:00+01:00	2023-06-21T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Wellhead maintenance and intervention works.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000760_002	Dismissed	Planned	Storage unavailability	2023-06-17T13:36:43+01:00	2023-06-02T09:00:00+01:00	2023-06-20T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Wellhead maintenance and intervention works.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000760_001	Dismissed	Planned	Storage unavailability	2023-05-30T09:33:05+01:00	2023-06-02T09:00:00+01:00	2023-06-18T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2 Wellhead maintenance and intervention works.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000727_002	Inactive	Planned	Injection unavailability	2023-05-23T19:02:32+01:00	2023-05-21T18:00:00+01:00	2023-05-23T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Gas compressor 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000727_001	Dismissed	Planned	Injection unavailability	2023-01-16T11:23:40+00:00	2023-05-21T18:00:00+01:00	2023-05-23T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Gas compressor 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000473_005	Inactive	Planned	Withdrawal unavailability	2023-05-22T19:02:32+01:00	2023-05-07T05:00:00+01:00	2023-05-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000473_004	Dismissed	Planned	Withdrawal unavailability	2023-05-22T10:24:38+01:00	2023-05-07T05:00:00+01:00	2023-05-22T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000474_003	Inactive	Planned	Withdrawal unavailability	2023-05-22T19:02:32+01:00	2023-05-01T05:00:00+01:00	2023-05-22T18:00:00+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_000000000000000000473_003	Dismissed	Planned	Withdrawal unavailability	2023-05-21T17:36:08+01:00	2023-05-07T05:00:00+01:00	2023-05-22T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000473_002	Dismissed	Planned	Withdrawal unavailability	2023-01-16T10:59:52+00:00	2023-05-07T05:00:00+01:00	2023-05-21T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000474_002	Dismissed	Planned	Withdrawal unavailability	2023-01-16T10:53:07+00:00	2023-05-01T05:00:00+01:00	2023-05-22T18:00:00+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_000000000000000000474_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T16:09:58+01:00	2023-05-05T05:00:00+01:00	2023-05-19T18:00:00+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_000000000000000000473_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T16:06:51+01:00	2023-05-07T05:00:00+01:00	2023-05-19T18:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000472_003	Inactive	Planned	Injection unavailability	2023-05-21T19:02:32+01:00	2023-05-07T05:00:00+01:00	2023-05-21T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000472_002	Dismissed	Planned	Injection unavailability	2023-01-16T11:03:23+00:00	2023-05-07T05:00:00+01:00	2023-05-21T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000472_001	Dismissed	Planned	Injection unavailability	2020-07-11T16:02:49+01:00	2023-05-07T05:00:00+01:00	2023-05-19T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000726_002	Inactive	Planned	Injection unavailability	2023-05-07T06:02:32+01:00	2023-05-06T05:00:00+01:00	2023-05-07T05:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Gas compressor 3.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000742_002	Inactive	Planned	Storage unavailability	2023-05-07T06:02:32+01:00	2023-04-27T05:00:00+01:00	2023-05-07T05:00:00+01:00	TWh	0.89	2.4117895	3.3017895	Planned Outage	Ald 8 Maintenance and sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000743_002	Inactive	Planned	Storage unavailability	2023-05-07T06:02:32+01:00	2023-04-30T05:00:00+01:00	2023-05-07T05:00:00+01:00	TWh	0.89	2.4117895	3.3017895	Planned Outage	Ald 2 maintenance and sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000726_001	Dismissed	Planned	Injection unavailability	2023-01-16T11:17:27+00:00	2023-05-06T05:00:00+01:00	2023-05-07T05:00:00+01:00	GWh/d	111.02	200.54	311.56	Planned Outage	Gas compressor 3.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000743_001	Dismissed	Planned	Storage unavailability	2023-04-14T13:13:50+01:00	2023-04-30T05:00:00+01:00	2023-05-07T05:00:00+01:00	TWh	0.89	2.4117895	3.3017895	Planned Outage	Ald 2 maintenance and sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000742_001	Dismissed	Planned	Storage unavailability	2023-04-14T13:09:17+01:00	2023-04-27T05:00:00+01:00	2023-05-07T05:00:00+01:00	TWh	0.89	2.4117895	3.3017895	Planned Outage	Ald 8 Maintenance and sonar survey	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000749_001	Active	Planned	Injection unavailability	2023-04-27T08:11:12+01:00	2026-07-01T05:00:00+01:00	2026-07-15T05:00:00+01:00	GWh/d	30	0	30	Planned Outage	Annual Full Site outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_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

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.