Last update at: 2024-04-23T17:30:00+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
< 3 4 5 6 7 >
Atwick	ATW_000000000000000000783_002	Inactive	Planned	Storage unavailability	2023-07-24T15:46:21+01:00	2023-07-20T05:00:00+01:00	2023-07-24T15:40:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Planned Outage	Cavity 5 Interventions and wellhead maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000783_001	Dismissed	Planned	Storage unavailability	2023-07-17T11:58:25+01:00	2023-07-20T05:00:00+01:00	2023-07-25T18:00:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Planned Outage	Cavity 5 Interventions and wellhead maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000759_002	Inactive	Planned	Storage unavailability	2023-06-29T19:02:32+01:00	2023-06-28T18:00:00+01:00	2023-06-29T18:00:00+01:00	TWh	0.483344926	2.985299774	3.4686447	Planned Outage	Cavity 6 Wellhead Panel Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000759_001	Dismissed	Planned	Storage unavailability	2023-05-30T09:23:28+01:00	2023-06-28T18:00:00+01:00	2023-06-29T18:00:00+01:00	TWh	0.483344926	2.985299774	3.4686447	Planned Outage	Cavity 6 Wellhead Panel Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000758_002	Inactive	Planned	Storage unavailability	2023-06-28T19:02:32+01:00	2023-06-27T18:00:00+01:00	2023-06-28T18:00:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Planned Outage	Cavity 5 Wellhead panel maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000758_001	Dismissed	Planned	Storage unavailability	2023-05-30T09:20:27+01:00	2023-06-27T18:00:00+01:00	2023-06-28T18:00:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Planned Outage	Cavity 5 Wellhead panel maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000761_005	Inactive	Planned	Storage unavailability	2023-06-27T19:02:33+01:00	2023-06-21T09:00:00+01:00	2023-06-27T18:00:00+01:00	TWh	0.468711066	2.999933634	3.4686447	Planned Outage	Cavity 9 Annual Wellhead Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000761_004	Dismissed	Planned	Storage unavailability	2023-06-26T16:26:05+01:00	2023-06-21T09:00:00+01:00	2023-06-27T18:00:00+01:00	TWh	0.468711066	2.999933634	3.4686447	Planned Outage	Cavity 9 Annual Wellhead Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000761_003	Dismissed	Planned	Storage unavailability	2023-06-23T11:53:57+01:00	2023-06-21T09:00:00+01:00	2023-06-26T18:00:00+01:00	TWh	0.468711066	2.999933634	3.4686447	Planned Outage	Cavity 9 Annual Wellhead Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000757_003	Inactive	Planned	Storage unavailability	2023-06-27T19:02:33+01:00	2023-06-26T18:00:00+01:00	2023-06-27T18:00:00+01:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 3 Wellhead Panel Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000768_003	Inactive	Unplanned	Storage unavailability	2023-06-27T19:02:33+01:00	2023-06-24T07:30:00+01:00	2023-06-27T18:00:00+01:00	TWh	0.48312084	2.5168128	3.4686447	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000768_002	Dismissed	Unplanned	Storage unavailability	2023-06-26T16:22:59+01:00	2023-06-24T07:30:00+01:00	2023-06-27T18:00:00+01:00	TWh	0.48312084	2.5168128	3.4686447	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000757_002	Dismissed	Planned	Storage unavailability	2023-05-30T09:18:02+01:00	2023-06-26T18:00:00+01:00	2023-06-27T18:00:00+01:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 3 Wellhead Panel Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000761_002	Dismissed	Planned	Storage unavailability	2023-06-17T13:38:52+01:00	2023-06-21T09:00:00+01:00	2023-06-25T18:00:00+01:00	TWh	0.468711066	2.999933634	3.4686447	Planned Outage	Cavity 9 Annual Wellhead Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000761_001	Dismissed	Planned	Storage unavailability	2023-05-30T09:54:03+01:00	2023-06-19T09:00:00+01:00	2023-06-23T18:00:00+01:00	TWh	0.468711066	2.999933634	3.4686447	Planned Outage	Cavity 9 Annual Wellhead Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000757_001	Dismissed	Planned	Storage unavailability	2023-05-30T09:16:24+01:00	2023-06-26T18:00:00+01:00	2023-06-27T18:00:00+01:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 2 Wellhead Panel Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000768_001	Dismissed	Unplanned	Storage unavailability	2023-06-24T08:10:17+01:00	2023-06-24T07:30:00+01:00	2023-06-26T18:00:00+01:00	TWh	0.48312084	2.5168128	3.4686447	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000756_002	Inactive	Planned	Storage unavailability	2023-06-26T19:02:32+01:00	2023-06-26T05:00:00+01:00	2023-06-26T18:00:00+01:00	TWh	0.421650307	3.046994393	3.4686447	Planned Outage	Cavity 1 Wellhead Panel maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000756_001	Dismissed	Planned	Storage unavailability	2023-05-30T09:11:23+01:00	2023-06-26T05:00:00+01:00	2023-06-26T18:00:00+01:00	TWh	0.421650307	3.046994393	3.4686447	Planned Outage	Cavity 1 Wellhead Panel maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000766_002	Inactive	Unplanned	Storage unavailability	2023-06-23T19:02:32+01:00	2023-06-21T07:53:00+01:00	2023-06-23T18:00:00+01:00	TWh	0.48312084	2.98552386	3.4686447	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000766_001	Dismissed	Unplanned	Storage unavailability	2023-06-21T07:55:58+01:00	2023-06-21T07:53:00+01:00	2023-06-23T18:00:00+01:00	TWh	0.48312084	2.98552386	3.4686447	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	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
Atwick	ATW_000000000000000000765_002	Inactive	Unplanned	Storage unavailability	2023-06-08T16:55:19+01:00	2023-06-07T16:00:00+01:00	2023-06-08T16:40:00+01:00	TWh	0.555695	2.9129497	3.4686447	Failure	Cavity 7 wellhead panel	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000765_001	Dismissed	Unplanned	Storage unavailability	2023-06-07T16:09:37+01:00	2023-06-07T16:00:00+01:00	2023-06-09T18:00:00+01:00	TWh	0.555695	2.9129497	3.4686447	Failure	Cavity 7 wellhead panel	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000762_002	Inactive	Unplanned	Storage unavailability	2023-06-06T15:36:51+01:00	2023-06-05T16:00:00+01:00	2023-06-06T15:25:00+01:00	TWh	0.3908	2.8395647	3.4686447	Failure	Atwick 3 WHP N2 Leak	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000762_001	Dismissed	Unplanned	Storage unavailability	2023-06-05T16:22:12+01:00	2023-06-05T16:00:00+01:00	2023-06-06T18:00:00+01:00	TWh	0.3908	2.8395647	3.4686447	Failure	Atwick 3 WHP N2 Leak	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000755_003	Inactive	Unplanned	Storage unavailability	2023-05-30T15:37:39+01:00	2023-05-27T13:36:00+01:00	2023-05-30T15:35:00+01:00	TWh	0.3908	3.0778447	3.4686447	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000755_002	Dismissed	Unplanned	Storage unavailability	2023-05-28T07:47:44+01:00	2023-05-27T13:36:00+01:00	2023-05-30T18:00:00+01:00	TWh	0.3908	3.0778447	3.4686447	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000755_001	Dismissed	Unplanned	Storage unavailability	2023-05-27T13:36:42+01:00	2023-05-27T13:36:00+01:00	2023-05-29T18:00:00+01:00	TWh	0.3908	3.0778447	3.4686447	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000754_002	Inactive	Unplanned	Storage unavailability	2023-05-25T14:47:07+01:00	2023-05-24T22:35:00+01:00	2023-05-25T14:45:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000754_001	Dismissed	Unplanned	Storage unavailability	2023-05-24T22:38:19+01:00	2023-05-24T22:35:00+01:00	2023-05-25T15:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	.	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
Atwick	ATW_000000000000000000709_002	Inactive	Unplanned	Storage unavailability	2022-12-12T12:01:44+00:00	2022-12-12T04:00:00+00:00	2022-12-12T16:00:00+00:00	TWh	0.483121	2.9855237	3.4686447	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000709_001	Dismissed	Unplanned	Storage unavailability	2022-12-12T04:45:16+00:00	2022-12-12T04:00:00+00:00	2022-12-12T16:00:00+00:00	TWh	0.483121	2.9855237	3.4686447	Failure	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000697_003	Inactive	Unplanned	Storage unavailability	2022-10-11T17:19:30+01:00	2022-10-07T16:00:00+01:00	2022-10-11T17:19:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000697_002	Dismissed	Unplanned	Storage unavailability	2022-10-10T14:20:42+01:00	2022-10-07T16:00:00+01:00	2022-10-11T18:00:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000697_001	Dismissed	Unplanned	Storage unavailability	2022-10-07T16:43:43+01:00	2022-10-07T16:00:00+01:00	2022-10-10T16:00:00+01:00	TWh	0.665322552	2.803322148	3.4686447	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000696_002	Inactive	Planned	Storage unavailability	2022-10-11T16:35:55+01:00	2022-10-11T08:00:00+01:00	2022-10-11T16:00:00+01:00	TWh	0.468711066	2.999933634	3.4686447	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000696_001	Dismissed	Planned	Storage unavailability	2022-10-06T13:25:59+01:00	2022-10-11T08:00:00+01:00	2022-10-11T16:00:00+01:00	TWh	0.468711066	2.999933634	3.4686447	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000681_004	Inactive	Unplanned	Storage unavailability	2022-08-02T22:02:33+01:00	2022-08-01T19:34:00+01:00	2022-08-02T21:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Failure	Cavity 7	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.