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_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_000000000000000000846_002	Inactive	Planned	Injection unavailability	2023-11-27T14:00:50+00:00	2023-11-27T10:00:00+00:00	2023-11-27T14:00:00+00:00	GWh/d	30	0	30	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000846_001	Dismissed	Planned	Injection unavailability	2023-11-23T09:33:13+00:00	2023-11-27T10:00:00+00:00	2023-11-27T14:00:00+00:00	GWh/d	30	0	30	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000847_002	Inactive	Planned	Withdrawal unavailability	2023-11-27T13:59:01+00:00	2023-11-27T10:00:00+00:00	2023-11-27T13:58:00+00:00	GWh/d	130	0	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000847_001	Dismissed	Planned	Withdrawal unavailability	2023-11-23T09:34:15+00:00	2023-11-27T10:00:00+00:00	2023-11-27T14:00:00+00:00	GWh/d	130	0	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_003	Inactive	Unplanned	Withdrawal unavailability	2023-11-09T14:25:28+00:00	2023-11-09T10:34:00+00:00	2023-11-09T14:25:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_002	Dismissed	Unplanned	Withdrawal unavailability	2023-11-09T13:23:48+00:00	2023-11-09T10:34:00+00:00	2023-11-09T14:30:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000839_001	Dismissed	Unplanned	Withdrawal unavailability	2023-11-09T10:35:13+00:00	2023-11-09T10:34:00+00:00	2023-11-09T13:00:00+00:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000788_003	Inactive	Planned	Withdrawal unavailability	2023-08-15T07:21:49+01:00	2023-07-21T15:16:00+01:00	2023-08-15T07:21:00+01:00	GWh/d	30	70	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000788_002	Dismissed	Planned	Withdrawal unavailability	2023-07-21T15:36:15+01:00	2023-07-21T15:16:00+01:00	2024-06-01T05:00:00+01:00	GWh/d	30	70	130	Planned Outage	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000764_002	Inactive	Unplanned	Withdrawal unavailability	2023-06-07T15:19:59+01:00	2023-06-07T11:50:00+01:00	2023-06-07T15:00:00+01:00	GWh/d	130	0	130	Failure	.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000764_001	Dismissed	Unplanned	Withdrawal unavailability	2023-06-07T11:52:59+01:00	2023-06-07T11:50:00+01:00	2023-06-07T16:00:00+01:00	GWh/d	130	0	130	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_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_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
Aldbrough	ALD_000000000000000000655_002	Inactive	Planned	Injection unavailability	2022-03-24T09:18:19+00:00	2022-03-24T05:00:00+00:00	2022-03-24T09:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	132KV Switchover	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000655_001	Dismissed	Planned	Injection unavailability	2022-03-16T14:46:23+00:00	2022-03-24T05:00:00+00:00	2022-03-24T09:00:00+00:00	GWh/d	311.56	0	311.56	Planned Outage	132KV Switchover	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000656_002	Inactive	Planned	Withdrawal unavailability	2022-03-24T09:18:04+00:00	2022-03-24T05:00:00+00:00	2022-03-24T09:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	132KV Switchover	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000656_001	Dismissed	Planned	Withdrawal unavailability	2022-03-16T14:47:31+00:00	2022-03-24T05:00:00+00:00	2022-03-24T09:00:00+00:00	GWh/d	342.3	0	342.3	Planned Outage	132KV Switchover	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000914_002	Inactive	Planned	Withdrawal unavailability	2024-04-25T16:02:32+01:00	2024-04-25T10:00:00+01:00	2024-04-25T15:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	1ESD5110 Valve test Rescheduled	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000914_001	Dismissed	Planned	Withdrawal unavailability	2024-04-24T12:31:34+01:00	2024-04-25T10:00:00+01:00	2024-04-25T15:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	1ESD5110 Valve test Rescheduled	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000781_001	Active	Planned	Injection unavailability	2023-07-17T07:45:35+01:00	2027-07-01T05:00:00+01:00	2027-07-15T05:00:00+01:00	GWh/d	30	0	30	Planned Outage	2027 Full Site outage (Injection)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000782_001	Active	Planned	Withdrawal unavailability	2023-07-17T07:49:13+01:00	2027-07-01T05:00:00+01:00	2027-07-15T05:00:00+01:00	GWh/d	130	0	130	Planned Outage	2027 full site outage (Withdrawal)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000594_002	Inactive	Unplanned	Storage unavailability	2021-07-20T09:12:07+01:00	2021-07-19T18:00:00+01:00	2021-07-20T12:00:00+01:00	TWh	0.81	1.6458177	2.4558177	Failure	2nd cavern unavailble	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000594_001	Dismissed	Unplanned	Storage unavailability	2021-07-19T18:58:06+01:00	2021-07-19T18:00:00+01:00	2021-07-20T12:00:00+01:00	TWh	0.81	1.6458177	2.4558177	Failure	2nd cavern unavailble	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000867_003	Inactive	Planned	Storage unavailability	2023-12-15T12:51:20+00:00	2023-12-14T05:00:00+00:00	2023-12-15T12:50:00+00:00	TWh	0.855	2.3071642	3.1621642	Planned Outage	A3 and A7 removed from service.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000867_002	Dismissed	Planned	Storage unavailability	2023-12-14T15:17:38+00:00	2023-12-14T05:00:00+00:00	2023-12-15T13:00:00+00:00	TWh	0.855	2.3071642	3.1621642	Planned Outage	A3 and A7 removed from service.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000867_001	Dismissed	Planned	Storage unavailability	2023-12-13T15:44:10+00:00	2023-12-14T05:00:00+00:00	2023-12-14T18:00:00+00:00	TWh	0.855	2.3071642	3.1621642	Planned Outage	A3 and A7 removed from service.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000910_001	Active	Planned	Withdrawal unavailability	2024-04-17T14:45:15+01:00	2024-06-05T10:00:00+01:00	2024-06-05T14:00:00+01:00	GWh/d	342.3	0	342.3	Planned Outage	A4z software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000909_001	Active	Planned	Injection unavailability	2024-04-17T14:43:14+01:00	2024-06-05T10:00:00+01:00	2024-06-05T14:00:00+01:00	GWh/d	311.56	0	311.56	Planned Outage	A4z software download	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000631_002	Inactive	Unplanned	Storage unavailability	2022-01-04T13:19:13+00:00	2022-01-04T11:23:00+00:00	2022-01-04T13:00:00+00:00	TWh	0.3012	3.014281	3.315481	Failure	A7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000631_001	Dismissed	Unplanned	Storage unavailability	2022-01-04T11:24:51+00:00	2022-01-04T11:23:00+00:00	2022-01-05T18:00:00+00:00	TWh	0.3012	3.014281	3.315481	Failure	A7	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000677_002	Dismissed	Planned	Storage unavailability	2022-09-12T12:36:06+01:00	2022-09-16T05:00:00+01:00	2022-10-07T18:00:00+01:00	TWh	0.43	2.0549147	2.9453019	Planned Outage	A7 Wellhead works.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000677_001	Dismissed	Planned	Storage unavailability	2022-06-30T14:31:38+01:00	2022-09-16T05:00:00+01:00	2022-10-07T18:00:00+01:00	TWh	0.43	2.0549147	2.4849147	Planned Outage	A7 Wellhead works.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000609_003	Inactive	Planned	Withdrawal unavailability	2021-10-16T01:02:32+01:00	2021-10-12T05:00:00+01:00	2021-10-16T00:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Adsorber valve fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000609_002	Dismissed	Planned	Withdrawal unavailability	2021-10-15T15:08:26+01:00	2021-10-12T05:00:00+01:00	2021-10-16T00:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Adsorber valve fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000609_001	Dismissed	Planned	Withdrawal unavailability	2021-10-04T13:11:02+01:00	2021-10-12T05:00:00+01:00	2021-10-15T18:00:00+01:00	GWh/d	121.5	220.8	342.3	Planned Outage	Adsorber valve fault	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000701_004	Inactive	Unplanned	Storage unavailability	2022-12-12T00:17:37+00:00	2022-11-07T10:00:00+00:00	2022-12-11T23:10:00+00:00	TWh	0.42	2.8817895	3.3017895	Failure	Ald 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000701_003	Dismissed	Unplanned	Storage unavailability	2022-12-11T22:59:24+00:00	2022-11-07T10:00:00+00:00	2022-12-11T23:10:00+00:00	TWh	0.42	2.8817895	3.3017895	Failure	Ald 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000701_002	Dismissed	Unplanned	Storage unavailability	2022-11-21T08:52:27+00:00	2022-11-07T10:00:00+00:00	2022-12-21T18:00:00+00:00	TWh	0.42	2.8817895	3.3017895	Failure	Ald 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000701_001	Dismissed	Unplanned	Storage unavailability	2022-11-07T10:52:38+00:00	2022-11-07T10:00:00+00:00	2022-11-28T05:00:00+00:00	TWh	0.42	2.8817895	3.3017895	Failure	Ald 1	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000866_001	Active	Planned	Storage unavailability	2023-12-12T15:46:18+00:00	2025-01-01T05:00:00+00:00	2026-01-01T05:00:00+00:00	TWh	0.412	2.7501642	3.1621642	Planned Outage	Ald 1 - AHP.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000793_002	Inactive	Unplanned	Storage unavailability	2023-08-17T05:34:39+01:00	2023-08-16T20:57:00+01:00	2023-08-17T05:00:00+01:00	TWh	0.824	2.3381642	3.1621642	Failure	Ald 1 & 9	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000793_001	Dismissed	Unplanned	Storage unavailability	2023-08-16T20:58:10+01:00	2023-08-16T20:57:00+01:00	2023-08-17T05:00:00+01:00	TWh	0.824	2.3381642	3.1621642	Failure	Ald 1 & 9	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_007	Inactive	Planned	Storage unavailability	2021-07-27T10:56:20+01:00	2021-07-05T05:00:00+01:00	2021-07-27T11:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000591_006	Dismissed	Planned	Storage unavailability	2021-07-23T12:34:49+01:00	2021-07-05T05:00:00+01:00	2021-07-27T18:00:00+01:00	TWh	0.42059	2.0352277	2.4558177	Planned Outage	Ald 1 flowline heater replacement.	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.