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

All times are in UTC.

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
< 4 5 6 7 8 >
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_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_000000000000000000883_005	Inactive	Planned	Withdrawal unavailability	2024-02-07T00:13:59+00:00	2024-02-06T16:25:00+00:00	2024-02-06T23:30:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000883_004	Dismissed	Planned	Withdrawal unavailability	2024-02-06T22:36:39+00:00	2024-02-06T16:25:00+00:00	2024-02-06T23:30:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000883_003	Dismissed	Planned	Withdrawal unavailability	2024-02-06T16:26:08+00:00	2024-02-06T16:25:00+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_000000000000000000883_002	Dismissed	Planned	Withdrawal unavailability	2024-02-05T15:06:11+00:00	2024-02-06T18:00:00+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_000000000000000000883_001	Dismissed	Planned	Withdrawal unavailability	2024-02-02T16:32:29+00:00	2024-02-05T17:00:00+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_000000000000000000791_012	Inactive	Planned	Withdrawal unavailability	2024-02-05T08:01:30+00:00	2024-01-15T19:30:00+00:00	2024-02-05T08:00:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000791_011	Dismissed	Planned	Withdrawal unavailability	2024-02-02T16:27:11+00:00	2024-01-15T19:30:00+00:00	2024-02-05T08:00:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000791_010	Dismissed	Planned	Withdrawal unavailability	2024-01-15T19:13:50+00:00	2024-01-15T19:30:00+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_000000000000000000791_009	Dismissed	Planned	Withdrawal unavailability	2024-01-15T16:59:22+00:00	2024-01-15T22:00:00+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_000000000000000000791_008	Dismissed	Planned	Withdrawal unavailability	2023-12-05T07:51:11+00:00	2024-01-15T18:00:00+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_000000000000000000791_007	Dismissed	Planned	Withdrawal unavailability	2023-11-23T09:43:25+00:00	2023-12-19T18:00:00+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_000000000000000000791_006	Dismissed	Planned	Withdrawal unavailability	2023-11-10T17:49:02+00:00	2023-11-28T18:00:00+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_000000000000000000791_005	Dismissed	Planned	Withdrawal unavailability	2023-11-06T17:49:25+00:00	2023-11-16T05:00:00+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_000000000000000000791_004	Dismissed	Planned	Withdrawal unavailability	2023-10-31T16:07:47+00:00	2023-11-06T18:00:00+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_000000000000000000791_003	Dismissed	Planned	Withdrawal unavailability	2023-09-20T09:12:42+01:00	2023-10-31T18:00:00+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_000000000000000000791_002	Dismissed	Planned	Withdrawal unavailability	2023-08-23T17:56:14+01:00	2023-09-30T18:00:00+01:00	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_000000000000000000791_001	Dismissed	Planned	Withdrawal unavailability	2023-08-15T07:20:58+01:00	2023-08-31T18:00:00+01:00	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_000000000000000000841_003	Dismissed	Planned	Withdrawal unavailability	2023-11-13T08:15:45+00:00	2023-11-16T05:00:00+00:00	2023-11-18T05:00:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000841_002	Dismissed	Planned	Withdrawal unavailability	2023-11-10T18:10:45+00:00	2023-11-16T05:00:00+00:00	2023-11-18T05:00:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000841_001	Dismissed	Planned	Withdrawal unavailability	2023-11-10T18:05:48+00:00	2023-11-16T05:00:00+00:00	2023-11-28T05:00:00+00:00	GWh/d	30	100	130	Planned Outage	Phase 6 reduction	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000780_003	Dismissed	Planned	Withdrawal unavailability	2023-08-10T07:56:01+01:00	2023-07-17T05:00:00+01:00	2023-08-31T18:00:00+01:00	GWh/d	30	100	130	Planned Outage	Vortisep	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000780_002	Dismissed	Planned	Withdrawal unavailability	2023-07-14T13:24:10+01:00	2023-07-17T05:00:00+01:00	2023-08-14T18:00:00+01:00	GWh/d	30	100	130	Planned Outage	Vortisep	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000780_001	Dismissed	Planned	Withdrawal unavailability	2023-07-10T10:17:37+01:00	2023-07-17T05:00:00+01:00	2023-07-24T18:00:00+01:00	GWh/d	30	100	130	Planned Outage	Vortisep	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000828_002	Dismissed	Planned	Withdrawal unavailability	2023-10-21T11:02:55+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_000000000000000000828_001	Dismissed	Planned	Withdrawal unavailability	2023-10-21T10:59:07+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_000000000000000000640_003	Inactive	Unplanned	Withdrawal unavailability	2022-08-01T06:02:33+01:00	2022-01-22T05:00:00+00:00	2022-08-01T05:00:00+01:00	GWh/d	30	100	130	Failure	This capacity will be available for limited durations but may not always be responsive to price signals	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000640_002	Dismissed	Unplanned	Withdrawal unavailability	2022-01-28T11:28:46+00:00	2022-01-22T05:00:00+00:00	2022-08-01T05:00:00+01:00	GWh/d	30	100	130	Failure	This capacity will be available for limited durations but may not always be responsive to price signals	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000640_001	Dismissed	Unplanned	Withdrawal unavailability	2022-01-21T11:27:54+00:00	2022-01-22T05:00:00+00:00	2022-01-29T05:00:00+00:00	GWh/d	30	100	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000638_001	Dismissed	Planned	Withdrawal unavailability	2022-01-17T17:42:42+00:00	2022-01-18T08:00:00+00:00	2022-01-18T18:00:00+00:00	GWh/d	32.4	97.6	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000637_002	Inactive	Unplanned	Withdrawal unavailability	2022-01-17T17:02:11+00:00	2022-01-17T12:30:00+00:00	2022-01-17T17:05:00+00:00	GWh/d	32.4	97.6	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000637_001	Dismissed	Unplanned	Withdrawal unavailability	2022-01-17T12:38:24+00:00	2022-01-17T12:30:00+00:00	2022-01-17T18:00:00+00:00	GWh/d	32.4	97.6	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000617_002	Inactive	Unplanned	Withdrawal unavailability	2021-11-25T12:02:38+00:00	2021-11-24T10:22:00+00:00	2021-11-25T12:00:00+00:00	GWh/d	32.4	97.6	130	Failure	Vortisep unavailable	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000617_001	Dismissed	Unplanned	Withdrawal unavailability	2021-11-24T10:31:03+00:00	2021-11-24T10:22:00+00:00	2021-11-25T18:00:00+00:00	GWh/d	32.4	97.6	130	Failure	Vortisep unavailable	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000728_002	Inactive	Unplanned	Withdrawal unavailability	2023-01-18T16:01:03+00:00	2023-01-18T11:10:00+00:00	2023-01-18T16:00:00+00:00	GWh/d	39	91	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000728_001	Dismissed	Unplanned	Withdrawal unavailability	2023-01-18T11:09:35+00:00	2023-01-18T11:10:00+00:00	2023-01-18T16:00:00+00:00	GWh/d	39	91	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
Aldbrough	ALD_000000000000000000763_005	Inactive	Unplanned	Withdrawal unavailability	2023-06-28T09:08:32+01:00	2023-06-06T09:45:00+01:00	2023-06-28T09:10:00+01:00	GWh/d	253.9	88.4	342.3	Failure	Reduction in max flow.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000763_004	Dismissed	Unplanned	Withdrawal unavailability	2023-06-22T11:32:01+01:00	2023-06-06T09:45:00+01:00	2023-06-28T18:00:00+01:00	GWh/d	253.9	88.4	342.3	Failure	Reduction in max flow.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000763_003	Dismissed	Unplanned	Withdrawal unavailability	2023-06-13T17:24:42+01:00	2023-06-06T09:45:00+01:00	2023-06-23T18:00:00+01:00	GWh/d	253.9	88.4	342.3	Failure	Reduction in max flow.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000649_001	Dismissed	Planned	Withdrawal unavailability	2022-02-17T11:28:04+00:00	2022-06-15T05:00:00+01:00	2022-07-01T05:00:00+01:00	GWh/d	47	83	130	Planned Outage	Stream 7 outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000648_004	Dismissed	Planned	Withdrawal unavailability	2022-02-17T11:26:00+00:00	2022-05-07T05:00:00+01:00	2022-05-26T05:00:00+01:00	GWh/d	47	83	130	Planned Outage	Stream 8 outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000648_003	Dismissed	Planned	Withdrawal unavailability	2022-02-17T11:23:16+00:00	2022-05-07T05:00:00+01:00	2022-05-26T05:00:00+01:00	GWh/d	17	83	130	Planned Outage	Stream 8 outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000693_001	Inactive	Planned	Withdrawal unavailability	2022-10-01T14:23:11+01:00	2022-09-21T16:20:00+01:00	2022-10-01T14:15:00+01:00	GWh/d	48.25	81.75	130	Failure	.	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.