Last update at: 2024-04-30T13:30:00+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
< 5 6 7 8 9 >
Atwick	ATW_000000000000000000652_002	Inactive	Unplanned	Injection unavailability	2022-02-24T12:32:45+00:00	2022-02-24T10:45:00+00:00	2022-02-24T12:30:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000652_001	Dismissed	Unplanned	Injection unavailability	2022-02-24T11:33:13+00:00	2022-02-24T10:45:00+00:00	2022-02-24T12:45:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000625_002	Inactive	Planned	Injection unavailability	2022-01-15T14:59:07+00:00	2022-01-15T08:00:00+00:00	2022-01-15T16:00:00+00:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000625_001	Dismissed	Planned	Injection unavailability	2021-12-16T14:07:39+00:00	2022-01-15T08:00:00+00:00	2022-01-15T16:00:00+00:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000634_002	Inactive	Unplanned	Injection unavailability	2022-01-13T16:37:09+00:00	2022-01-13T14:20:00+00:00	2022-01-13T16:30:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000634_001	Dismissed	Unplanned	Injection unavailability	2022-01-13T14:25:34+00:00	2022-01-13T14:20:00+00:00	2022-01-13T18:00:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000619_002	Inactive	Unplanned	Injection unavailability	2021-11-25T23:30:13+00:00	2021-11-25T20:30:00+00:00	2021-11-25T23:22:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000619_001	Dismissed	Unplanned	Injection unavailability	2021-11-25T21:07:53+00:00	2021-11-25T20:30:00+00:00	2021-11-26T02:00:00+00:00	GWh/d	30	0	30	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000598_002	Inactive	Planned	Injection unavailability	2021-10-22T16:16:59+01:00	2021-10-22T09:00:00+01:00	2021-10-22T16:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000598_001	Dismissed	Planned	Injection unavailability	2021-07-26T15:39:45+01:00	2021-10-22T09:00:00+01:00	2021-10-22T17:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000596_002	Inactive	Planned	Injection unavailability	2021-10-21T16:33:44+01:00	2021-10-21T09:00:00+01:00	2021-10-21T16:30:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000596_001	Dismissed	Planned	Injection unavailability	2021-07-26T15:37:01+01:00	2021-10-21T09:00:00+01:00	2021-10-21T17:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000486_005	Inactive	Planned	Injection unavailability	2021-07-18T17:40:26+01:00	2021-07-02T05:00:00+01:00	2021-07-18T17:40:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000486_004	Dismissed	Planned	Injection unavailability	2021-04-01T23:06:09+01:00	2021-07-02T05:00:00+01:00	2021-07-18T18:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000486_003	Dismissed	Planned	Injection unavailability	2021-03-12T11:18:08+00:00	2021-07-02T05:00:00+01:00	2021-07-18T05:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000486_002	Dismissed	Planned	Injection unavailability	2020-07-11T21:48:35+01:00	2021-07-01T05:00:00+01:00	2021-07-15T05:00:00+01:00	GWh/d	30	0	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000486_001	Dismissed	Planned	Injection unavailability	2020-07-11T21:30:42+01:00	2021-07-01T05:00:00+01:00	2021-07-15T05:00:00+01:00	GWh/d	0	30	30	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000590_002	Inactive	Unplanned	Injection unavailability	2021-06-30T07:46:01+01:00	2021-06-30T05:37:00+01:00	2021-06-30T07:40:00+01:00	GWh/d	7.5	22.5	30	Failure	No 3 Compressor.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000590_001	Dismissed	Unplanned	Injection unavailability	2021-06-30T05:38:17+01:00	2021-06-30T05:37:00+01:00	2021-06-30T12:00:00+01:00	GWh/d	7.5	22.5	30	Failure	No 3 Compressor.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000920_002	Active	Planned	Withdrawal unavailability	2024-04-25T18:27:39+01:00	2024-05-08T08:00:00+01:00	2024-05-08T16:00:00+01:00	GWh/d	70	60	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000920_001	Dismissed	Planned	Withdrawal unavailability	2024-04-25T14:24:39+01:00	2024-05-08T08:00:00+01:00	2024-05-08T16:00:00+01:00	GWh/d	30	60	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000919_001	Active	Planned	Withdrawal unavailability	2024-04-25T14:09:43+01:00	2024-06-18T08:00:00+01:00	2024-06-18T16:00:00+01:00	GWh/d	70	60	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000918_001	Active	Unplanned	Withdrawal unavailability	2024-04-25T14:08:36+01:00	2024-06-17T08:00:00+01:00	2024-06-17T16:00:00+01:00	GWh/d	70	60	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000917_001	Active	Planned	Withdrawal unavailability	2024-04-25T14:06:26+01:00	2024-06-14T08:00:00+01:00	2024-06-14T16:00:00+01:00	GWh/d	70	60	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000916_001	Active	Planned	Withdrawal unavailability	2024-04-25T14:03:30+01:00	2024-06-13T08:00:00+01:00	2024-06-13T16:00:00+01:00	GWh/d	70	60	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000915_001	Active	Planned	Withdrawal unavailability	2024-04-25T14:02:10+01:00	2024-06-12T08:00:00+01:00	2024-06-12T16:00:00+01:00	GWh/d	70	60	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000827_002	Dismissed	Planned	Withdrawal unavailability	2024-04-19T16:08:26+01:00	2024-07-23T05:00:00+01:00	2024-08-06T18:00:00+01:00	GWh/d	96.67	33.33	130	Planned Outage	Phase 6 - outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000827_001	Dismissed	Planned	Withdrawal unavailability	2023-10-20T20:21:46+01:00	2024-07-23T05:00:00+01:00	2024-08-06T18:00:00+01:00	GWh/d	96.67	33.33	130	Planned Outage	Phase 6 - outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000829_002	Active	Planned	Withdrawal unavailability	2024-04-10T07:20:11+01:00	2024-08-31T05:00:00+01:00	2024-09-29T18:00:00+01:00	GWh/d	70	60	130	Planned Outage	Vortisep outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000829_001	Dismissed	Planned	Withdrawal unavailability	2023-10-21T11:00:57+01:00	2024-08-31T05:00:00+01:00	2024-09-29T18:00:00+01:00	GWh/d	30	100	130	Planned Outage	Vortisep outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000897_003	Inactive	Planned	Withdrawal unavailability	2024-04-09T08:52:40+01:00	2024-03-20T18:00:00+00:00	2024-04-09T08:50:00+01:00	GWh/d	30	100	130	Planned Outage	Phase 6 Reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000897_002	Dismissed	Planned	Withdrawal unavailability	2024-03-11T07:29:21+00:00	2024-03-20T18:00:00+00:00	2024-06-01T05:00:00+01:00	GWh/d	30	100	130	Planned Outage	Phase 6 Reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000897_001	Dismissed	Planned	Withdrawal unavailability	2024-03-06T16:52:32+00:00	2024-03-20T18:00:00+00:00	2024-06-01T18:00:00+01:00	GWh/d	30	100	130	Planned Outage	Phase 6 Reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000901_006	Inactive	Unplanned	Withdrawal unavailability	2024-04-09T08:52:07+01:00	2024-03-28T12:10:00+00:00	2024-04-09T08:50:00+01:00	GWh/d	50	80	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000901_005	Dismissed	Unplanned	Withdrawal unavailability	2024-04-07T06:51:00+01:00	2024-03-28T12:10:00+00:00	2024-04-09T18:00:00+01:00	GWh/d	50	80	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000901_004	Dismissed	Unplanned	Withdrawal unavailability	2024-03-31T15:04:26+01:00	2024-03-28T12:10:00+00:00	2024-04-07T18:00:00+01:00	GWh/d	50	80	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000901_003	Dismissed	Unplanned	Withdrawal unavailability	2024-03-28T15:12:40+00:00	2024-03-28T12:10:00+00:00	2024-03-31T18:00:00+01:00	GWh/d	50	80	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000901_002	Dismissed	Unplanned	Withdrawal unavailability	2024-03-28T12:19:25+00:00	2024-03-28T12:10:00+00:00	2024-03-31T18:00:00+01:00	GWh/d	70	60	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000901_001	Dismissed	Unplanned	Withdrawal unavailability	2024-03-28T12:10:18+00:00	2024-03-28T12:10:00+00:00	2024-03-31T18:00:00+01:00	GWh/d	70	60	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000905_001	Active	Planned	Withdrawal unavailability	2024-04-09T08:51:41+01:00	2024-04-09T08:50:00+01:00	2025-07-01T05:00:00+01:00	GWh/d	40	90	130	Planned Outage	Phase 6 Reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000896_003	Inactive	Planned	Withdrawal unavailability	2024-03-20T17:59:26+00:00	2024-03-19T07:00:00+00:00	2024-03-20T18:00:00+00:00	GWh/d	97.44	32.56	130	Planned Outage	Phase 6 Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000896_002	Dismissed	Planned	Withdrawal unavailability	2024-03-06T15:47:47+00:00	2024-03-19T07:00:00+00:00	2024-03-20T18:00:00+00:00	GWh/d	97.44	32.56	130	Planned Outage	Phase 6 Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000896_001	Dismissed	Planned	Withdrawal unavailability	2024-03-06T14:08:40+00:00	2024-03-19T07:00:00+00:00	2024-03-20T18:00:00+00:00	GWh/d	100	30	130	Planned Outage	Phase 6 Outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000886_005	Inactive	Planned	Withdrawal unavailability	2024-03-19T07:07:54+00:00	2024-02-13T18:00:00+00:00	2024-03-19T07:00:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000886_004	Dismissed	Planned	Withdrawal unavailability	2024-03-06T14:04:53+00:00	2024-02-13T18:00:00+00:00	2024-03-19T07:00:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000886_003	Dismissed	Planned	Withdrawal unavailability	2024-02-12T08:13:23+00:00	2024-02-13T18:00:00+00:00	2024-06-01T05:00:00+01:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000886_002	Dismissed	Planned	Withdrawal unavailability	2024-02-07T14:29:46+00:00	2024-02-16T18:00:00+00:00	2024-06-01T05:00:00+01:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000886_001	Dismissed	Planned	Withdrawal unavailability	2024-02-06T22:40:14+00:00	2024-02-07T17:00:00+00:00	2024-06-01T05:00:00+01:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000898_002	Inactive	Unplanned	Withdrawal unavailability	2024-03-15T13:46:19+00:00	2024-03-13T16:42:00+00:00	2024-03-15T13:40:00+00:00	GWh/d	60	70	130	Failure	Vortisep outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000898_001	Dismissed	Unplanned	Withdrawal unavailability	2024-03-13T16:45:59+00:00	2024-03-13T16:42:00+00:00	2024-03-15T17:00:00+00:00	GWh/d	60	70	130	Failure	Vortisep 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.