Last update at: 2024-05-14T13:30:00+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
< 8 9 10 11 12 >
Atwick	ATW_000000000000000000618_001	Dismissed	Unplanned	Storage unavailability	2021-11-24T16:25:02+00:00	2021-11-24T16:23:00+00:00	2021-11-26T18:00:00+00:00	TWh	0.371148	2.9581143	3.3292623	Planned Outage	Cavity outage	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000620_002	Inactive	Unplanned	Withdrawal unavailability	2021-11-25T23:30:47+00:00	2021-11-25T20:30:00+00:00	2021-11-25T23:22:00+00:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000620_001	Dismissed	Unplanned	Withdrawal unavailability	2021-11-25T21:09:10+00:00	2021-11-25T20:30:00+00:00	2021-11-26T02:00:00+00:00	GWh/d	130	0	130	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_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_000000000000000000612_002	Inactive	Planned	Storage unavailability	2021-11-05T14:48:59+00:00	2021-10-31T13:00:00+00:00	2021-11-05T15:00:00+00:00	TWh	0.46913	2.8601323	3.3292623	Planned Outage	Scheduled maintenance A9	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000612_001	Dismissed	Planned	Storage unavailability	2021-10-31T13:08:55+00:00	2021-10-31T13:00:00+00:00	2021-11-05T18:00:00+00:00	TWh	0.46913	2.8601323	3.3292623	Planned Outage	Scheduled maintenance A9	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_000000000000000000599_002	Inactive	Planned	Withdrawal unavailability	2021-10-22T16:16:02+01:00	2021-10-22T09:00:00+01:00	2021-10-22T16:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000599_001	Dismissed	Planned	Withdrawal unavailability	2021-07-26T15:40:47+01:00	2021-10-22T09:00:00+01:00	2021-10-22T17:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000597_002	Inactive	Planned	Withdrawal unavailability	2021-10-21T16:34:30+01:00	2021-10-21T09:00:00+01:00	2021-10-21T16:30:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000597_001	Dismissed	Planned	Withdrawal unavailability	2021-07-26T15:38:24+01:00	2021-10-21T09:00:00+01:00	2021-10-21T17:00:00+01:00	GWh/d	130	0	130	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_000000000000000000595_002	Inactive	Planned	Withdrawal unavailability	2021-09-09T10:34:17+01:00	2021-09-07T08:00:00+01:00	2021-09-09T10:33:00+01:00	GWh/d	130	0	130	Planned Outage	NG Requirement - Asset can Withdraw if required	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000595_001	Dismissed	Planned	Withdrawal unavailability	2021-07-26T15:29:54+01:00	2021-09-07T08:00:00+01:00	2021-09-09T16:00:00+01:00	GWh/d	130	0	130	Planned Outage	NG Requirement - Asset can Withdraw if required	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000605_002	Inactive	Unplanned	Withdrawal unavailability	2021-08-11T18:20:48+01:00	2021-08-11T13:15:00+01:00	2021-08-11T18:19:00+01:00	GWh/d	130	0	130	Failure		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000605_001	Dismissed	Unplanned	Withdrawal unavailability	2021-08-11T13:25:08+01:00	2021-08-11T13:15:00+01:00	2021-08-11T18:30:00+01:00	GWh/d	130	0	130	Failure		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_000000000000000000487_005	Inactive	Planned	Withdrawal unavailability	2021-07-18T17:39:27+01:00	2021-07-02T05:00:00+01:00	2021-07-18T17:40:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000487_004	Dismissed	Planned	Withdrawal unavailability	2021-04-01T23:05:49+01:00	2021-07-02T05:00:00+01:00	2021-07-18T18:00:00+01:00	GWh/d	130	0	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000487_003	Dismissed	Planned	Withdrawal unavailability	2021-03-12T11:17:11+00:00	2021-07-02T05:00:00+01:00	2021-07-18T05:00:00+01:00	GWh/d	130	0	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_000000000000000000487_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T21:34:14+01:00	2021-07-01T05:00:00+01:00	2021-07-08T05:00:00+01:00	GWh/d	130	0	130	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_000000000000000000570_004	Inactive	Planned	Withdrawal unavailability	2021-06-16T08:58:18+01:00	2021-04-07T20:20:00+01:00	2021-06-16T08:57:00+01:00	GWh/d	50	80	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000570_003	Dismissed	Planned	Withdrawal unavailability	2021-04-18T18:54:40+01:00	2021-04-07T20:20:00+01:00	2021-07-07T18:00:00+01:00	GWh/d	50	80	130	Planned Outage		21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000583_003	Inactive	Planned	Storage unavailability	2021-06-02T15:34:06+01:00	2021-05-30T19:05:00+01:00	2021-06-02T15:34:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000583_002	Dismissed	Planned	Storage unavailability	2021-05-30T19:05:34+01:00	2021-05-30T19:05:00+01:00	2021-06-06T18:00:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000583_001	Dismissed	Planned	Storage unavailability	2021-05-05T16:01:27+01:00	2021-06-01T05:00:00+01:00	2021-06-06T18:00:00+01:00	TWh	0.226309	3.1062104	3.3325194	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000582_003	Dismissed	Planned	Storage unavailability	2021-05-30T19:04:41+01:00	2021-05-27T16:30:00+01:00	2021-05-30T19:05:00+01:00	TWh	0.3012746	3.0312448	3.3325194	Planned Outage	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000582_002	Dismissed	Planned	Storage unavailability	2021-05-27T16:15:25+01:00	2021-05-27T16:30:00+01:00	2021-05-31T18:00:00+01:00	TWh	0.3012746	3.0312448	3.3325194	Planned Outage	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000582_001	Dismissed	Planned	Storage unavailability	2021-05-05T15:56:02+01:00	2021-05-28T05:00:00+01:00	2021-05-31T18:00:00+01:00	TWh	0.3012746	3.0312448	3.3325194	Planned Outage	Cavity 7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000581_002	Dismissed	Planned	Storage unavailability	2021-05-27T16:14:36+01:00	2021-05-24T05:00:00+01:00	2021-05-27T16:20:00+01:00	TWh	0.459502528	2.873016872	3.3325194	Planned Outage	Cavity 8	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000581_001	Dismissed	Planned	Storage unavailability	2021-05-05T15:54:24+01:00	2021-05-24T05:00:00+01:00	2021-05-27T18:00:00+01:00	TWh	0.459502528	2.873016872	3.3325194	Planned Outage	Cavity 8	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_000000000000000000488_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T21:35:53+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_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_000000000000000000491_001	Dismissed	Planned	Withdrawal unavailability	2020-07-11T21:50:40+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_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_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_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

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.