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 >
Atwick	ATW_000000000000000000496_001	Dismissed	Planned	Withdrawal unavailability	2020-07-12T00:16:27+01:00	2024-07-01T05:00:00+01:00	2024-07-08T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000497_001	Dismissed	Planned	Withdrawal unavailability	2020-07-12T00:17:47+01:00	2024-07-08T05:00:00+01:00	2024-08-01T05:00:00+01:00	GWh/d	97.44	32.56	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000493_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T13:48:32+01:00	2023-07-01T05:00:00+01:00	2023-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000494_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T13:50:06+01:00	2023-07-08T05:00:00+01:00	2023-07-15T05:00:00+01:00	GWh/d	97.44	32.56	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000496_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T13:57:44+01:00	2024-07-01T05:00:00+01:00	2024-08-01T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000497_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T13:58:14+01:00	2024-07-08T05:00:00+01:00	2024-08-01T05:00:00+01:00	GWh/d	97.44	32.56	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000496_003	Dismissed	Planned	Withdrawal unavailability	2020-07-28T14:06:03+01:00	2024-07-01T05:00:00+01:00	2024-08-01T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000498_001	Dismissed	Planned	Withdrawal unavailability	2020-07-28T14:11:39+01:00	2020-07-01T05:00:00+01:00	2024-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000499_001	Active	Planned	Withdrawal unavailability	2020-07-28T14:14:38+01:00	2024-07-15T05:00:00+01:00	2024-08-01T00:00:00+01:00	GWh/d	96.67	33.33	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000490_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T14:39:15+01:00	2022-07-01T05:00:00+01:00	2022-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000491_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T14:39:42+01:00	2022-07-08T05:00:00+01:00	2022-07-15T05:00:00+01:00	GWh/d	97.44	32.56	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000487_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T14:41:53+01:00	2021-07-01T05:00:00+01:00	2021-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000488_002	Dismissed	Planned	Withdrawal unavailability	2020-07-28T14:42:30+01:00	2021-07-08T05:00:00+01:00	2021-07-15T05:00:00+01:00	GWh/d	97.44	32.56	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000498_002	Active	Planned	Withdrawal unavailability	2020-07-28T17:58:18+01:00	2024-07-01T05:00:00+01:00	2024-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000505_001	Dismissed	Unplanned	Injection unavailability	2020-09-20T08:54:10+01:00	2020-09-20T09:00:00+01:00	2020-09-27T18:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_002	Dismissed	Planned	Injection unavailability	2020-09-20T08:57:21+01:00	2024-05-12T05:00:00+01:00	2024-05-21T09:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_003	Dismissed	Planned	Injection unavailability	2020-09-20T09:03:10+01:00	2024-05-12T05:00:00+01:00	2024-05-21T18:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	Full Site Outage	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000509_001	Dismissed	Unplanned	Injection unavailability	2020-09-26T21:04:21+01:00	2020-09-26T21:00:00+01:00	2020-09-28T12:00:00+01:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000509_002	Inactive	Unplanned	Injection unavailability	2020-09-27T10:38:21+01:00	2020-09-26T21:00:00+01:00	2020-09-27T10:41:00+01:00	GWh/d	111.02	200.54	311.56	Failure		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000510_001	Dismissed	Planned	Withdrawal unavailability	2020-09-29T11:00:14+01:00	2020-10-23T18:01:00+01:00	2020-10-28T23:59:00+00:00	GWh/d	73.08	56.92	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000435_003	Inactive	Planned	Injection unavailability	2020-10-04T16:24:08+01:00	2020-09-21T06:00:00+01:00	2020-10-04T16:23:00+01:00	GWh/d	30	0	30	Planned Outage	Planned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000436_003	Inactive	Planned	Withdrawal unavailability	2020-10-04T16:25:20+01:00	2020-09-21T06:00:00+01:00	2020-10-04T16:23:00+01:00	GWh/d	130	0	130	Planned Outage	Planned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000437_003	Dismissed	Planned	Withdrawal unavailability	2020-10-04T16:27:17+01:00	2020-10-04T16:23:00+01:00	2020-10-23T18:00:00+01:00	GWh/d	97.44	32.56	130	Planned Outage	Planned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000430_003	Inactive	Planned	Withdrawal unavailability	2020-10-08T21:47:29+01:00	2020-09-26T05:00:00+01:00	2020-10-08T21:45:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000511_001	Dismissed	Unplanned	Storage unavailability	2020-10-10T10:59:54+01:00	2020-10-10T10:52:00+01:00	2020-10-12T18:00:00+01:00	TWh	0.28583	2.8540514	3.1398814	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000512_001	Dismissed	Unplanned	Injection unavailability	2020-10-10T11:35:55+01:00	2020-10-10T11:30:00+01:00	2020-10-11T05:00:00+01:00	GWh/d	0	30	30	Failure	unplanned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000513_001	Dismissed	Unplanned	Withdrawal unavailability	2020-10-10T11:36:52+01:00	2020-10-10T11:30:00+01:00	2020-10-11T05:00:00+01:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000512_002	Dismissed	Unplanned	Injection unavailability	2020-10-10T11:37:04+01:00	2020-10-10T11:30:00+01:00	2020-10-11T05:00:00+01:00	GWh/d	30	0	30	Failure	unplanned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000513_002	Dismissed	Unplanned	Withdrawal unavailability	2020-10-10T19:10:15+01:00	2020-10-10T11:30:00+01:00	2020-10-12T18:00:00+01:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000512_003	Dismissed	Unplanned	Injection unavailability	2020-10-10T19:10:41+01:00	2020-10-10T11:30:00+01:00	2020-10-12T18:00:00+01:00	GWh/d	30	0	30	Failure	unplanned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000511_002	Dismissed	Unplanned	Storage unavailability	2020-10-11T16:27:33+01:00	2020-10-10T10:52:00+01:00	2020-10-13T18:00:00+01:00	TWh	0.28583	2.8540514	3.1398814	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000513_003	Dismissed	Unplanned	Withdrawal unavailability	2020-10-11T16:27:45+01:00	2020-10-10T11:30:00+01:00	2020-10-13T18:00:00+01:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000512_004	Dismissed	Unplanned	Injection unavailability	2020-10-11T16:27:57+01:00	2020-10-10T11:30:00+01:00	2020-10-13T18:00:00+01:00	GWh/d	30	0	30	Failure	unplanned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000511_003	Dismissed	Unplanned	Storage unavailability	2020-10-13T14:19:22+01:00	2020-10-10T10:52:00+01:00	2020-10-14T13:00:00+01:00	TWh	0.28583	2.8540514	3.1398814	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000512_005	Dismissed	Unplanned	Injection unavailability	2020-10-13T14:19:43+01:00	2020-10-10T11:30:00+01:00	2020-10-14T13:00:00+01:00	GWh/d	30	0	30	Failure	unplanned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000513_004	Dismissed	Unplanned	Withdrawal unavailability	2020-10-13T14:20:26+01:00	2020-10-10T11:30:00+01:00	2020-10-14T13:00:00+01:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000513_005	Inactive	Unplanned	Withdrawal unavailability	2020-10-14T12:35:54+01:00	2020-10-10T11:30:00+01:00	2020-10-14T12:40:00+01:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000512_006	Inactive	Unplanned	Injection unavailability	2020-10-14T12:37:18+01:00	2020-10-10T11:30:00+01:00	2020-10-14T12:40:00+01:00	GWh/d	30	0	30	Failure	unplanned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000511_004	Dismissed	Unplanned	Storage unavailability	2020-10-14T12:51:35+01:00	2020-10-10T10:52:00+01:00	2020-10-14T12:52:00+01:00	TWh	0.28583	2.8540514	3.1398814	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000514_001	Dismissed	Unplanned	Storage unavailability	2020-10-15T07:24:20+01:00	2020-10-15T07:00:00+01:00	2020-10-15T18:00:00+01:00	TWh	0.38131	2.7585714	3.1398814	Failure	unplanned	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000514_002	Inactive	Unplanned	Storage unavailability	2020-10-15T17:15:12+01:00	2020-10-15T07:00:00+01:00	2020-10-15T17:15:00+01:00	TWh	0.38131	2.7585714	3.1398814	Failure	unplanned	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000510_002	Dismissed	Planned	Withdrawal unavailability	2020-10-19T12:31:46+01:00	2020-10-23T18:01:00+01:00	2020-10-28T23:59:00+00:00	GWh/d	73.08	56.92	130	Planned Outage	Commissioning runs, so output may vary.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000515_001	Dismissed	Planned	Storage unavailability	2020-10-22T07:41:20+01:00	2020-10-22T07:40:00+01:00	2020-10-30T18:00:00+00:00	TWh	0.43824719	2.70163421	3.1398814	Planned Outage	Cavity 9 Well Maintenance	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000437_004	Inactive	Planned	Withdrawal unavailability	2020-10-23T08:27:45+01:00	2020-10-04T16:23:00+01:00	2020-10-23T08:30:00+01:00	GWh/d	97.44	32.56	130	Planned Outage	Planned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000510_003	Dismissed	Planned	Withdrawal unavailability	2020-10-23T08:28:25+01:00	2020-10-23T08:30:00+01:00	2020-10-28T23:59:00+00:00	GWh/d	73.08	56.92	130	Planned Outage	Commissioning runs, so output may vary.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000510_004	Dismissed	Planned	Withdrawal unavailability	2020-10-23T10:58:10+01:00	2020-11-02T08:00:00+00:00	2020-11-07T18:00:00+00:00	GWh/d	73.08	56.92	130	Planned Outage	Commissioning runs, so output may vary.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000516_001	Dismissed	Planned	Withdrawal unavailability	2020-10-23T11:00:59+01:00	2020-10-23T11:00:00+01:00	2020-11-02T08:00:00+00:00	GWh/d	97.44	32.56	130	Planned Outage	Planned outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000432_002	Dismissed	Planned	Injection unavailability	2020-10-25T16:27:18+00:00	2020-10-12T05:00:00+01:00	2020-10-26T05:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000432_003	Inactive	Planned	Injection unavailability	2020-10-26T06:01:50+00:00	2020-10-12T05:00:00+01:00	2020-10-26T05:00:00+00:00	GWh/d	111.02	200.54	311.56	Planned Outage		21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000517_001	Dismissed	Unplanned	Injection unavailability	2020-10-26T09:16:47+00:00	2020-10-26T09:20:00+00:00	2020-10-27T12:00:00+00:00	GWh/d	100.27	211.29	311.56	Failure		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.