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_000000000000000000791_003	Active	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
Aldbrough	ALD_000000000000000000799_002	Inactive	Planned	Storage unavailability	2023-09-17T20:02:32+01:00	2023-09-14T05:00:00+01:00	2023-09-17T19:00:00+01:00	TWh	0.3518	2.8103642	3.1621642	Planned Outage	ALD 5 Wellhead Maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000799_001	Dismissed	Planned	Storage unavailability	2023-08-30T15:54:37+01:00	2023-09-14T05:00:00+01:00	2023-09-17T19:00:00+01:00	TWh	0.3518	2.8103642	3.1621642	Planned Outage	ALD 5 Wellhead Maintenance.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000780_006	Active	Planned	Withdrawal unavailability	2023-09-15T09:17:54+01:00	2023-07-17T05:00:00+01:00	2023-10-31T18:00:00+00:00	GWh/d	60	70	130	Planned Outage	Vortisep / Phase 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000780_005	Dismissed	Planned	Withdrawal unavailability	2023-08-23T17:47:48+01:00	2023-07-17T05:00:00+01:00	2023-09-30T18:00:00+01:00	GWh/d	60	70	130	Planned Outage	Vortisep / Phase 6	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000780_004	Dismissed	Planned	Withdrawal unavailability	2023-08-15T07:17:26+01:00	2023-07-17T05:00:00+01:00	2023-08-31T18:00:00+01:00	GWh/d	60	70	130	Planned Outage	Vortisep / Phase 6	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
Aldbrough	ALD_000000000000000000809_002	Inactive	Unplanned	Storage unavailability	2023-09-14T19:02:32+01:00	2023-09-14T10:00:00+01:00	2023-09-14T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Ald 3 WHM + RTS	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000809_001	Dismissed	Unplanned	Storage unavailability	2023-09-14T09:01:11+01:00	2023-09-14T10:00:00+01:00	2023-09-14T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Ald 3 WHM + RTS	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_005	Inactive	Planned	Storage unavailability	2023-09-14T06:02:32+01:00	2023-09-12T06:00:00+01:00	2023-09-14T05:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3 WHM	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_004	Dismissed	Planned	Storage unavailability	2023-09-13T09:51:24+01:00	2023-09-12T06:00:00+01:00	2023-09-14T05:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3 WHM	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_003	Dismissed	Planned	Storage unavailability	2023-08-30T15:28:22+01:00	2023-09-12T06:00:00+01:00	2023-09-22T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_002	Dismissed	Planned	Storage unavailability	2023-08-23T09:12:19+01:00	2023-09-10T06:00:00+01:00	2023-09-22T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000772_001	Dismissed	Planned	Storage unavailability	2023-07-05T15:27:29+01:00	2023-09-12T06:00:00+01:00	2023-09-24T18:00:00+01:00	TWh	0.412	2.8872861	3.2992861	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000805_002	Inactive	Planned	Storage unavailability	2023-09-12T10:32:11+01:00	2023-09-11T08:00:00+01:00	2023-09-12T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000805_001	Dismissed	Planned	Storage unavailability	2023-09-07T13:34:25+01:00	2023-09-11T08:00:00+01:00	2023-09-12T18:00:00+01:00	TWh	0.238280125	3.230364575	3.4686447	Planned Outage	Cavity 2	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000786_004	Inactive	Planned	Storage unavailability	2023-09-05T16:33:08+01:00	2023-08-25T05:00:00+01:00	2023-09-05T16:32:00+01:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 3 Intervention works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000786_003	Dismissed	Planned	Storage unavailability	2023-08-17T14:47:49+01:00	2023-08-25T05:00:00+01:00	2023-09-09T18:00:00+01:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 3 Intervention works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000786_002	Dismissed	Planned	Storage unavailability	2023-08-17T14:02:38+01:00	2023-08-25T05:00:00+01:00	2023-09-05T18:00:00+01:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 3 Intervention works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000786_001	Dismissed	Planned	Storage unavailability	2023-07-17T12:12:54+01:00	2023-09-26T05:00:00+01:00	2023-10-24T18:00:00+01:00	TWh	0.390799835	3.077844865	3.4686447	Planned Outage	Cavity 3 Intervention works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000804_001	Active	Planned	Withdrawal unavailability	2023-09-05T09:58:44+01:00	2023-10-10T08:00:00+01:00	2023-10-10T17:00:00+01:00	GWh/d	130	0	130	Planned Outage	Withdrawal - USM Validations(Day 2)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000803_001	Active	Planned	Injection unavailability	2023-09-05T09:57:41+01:00	2023-10-10T08:00:00+01:00	2023-10-10T17:00:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 2)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000802_001	Active	Planned	Withdrawal unavailability	2023-09-05T09:55:24+01:00	2023-10-09T08:00:00+01:00	2023-10-09T17:00:00+01:00	GWh/d	130	0	130	Planned Outage	Withdrawal - USM Validations(Day 1)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000801_001	Active	Planned	Injection unavailability	2023-09-05T09:53:56+01:00	2023-10-09T08:00:00+01:00	2023-10-09T17:00:00+01:00	GWh/d	30	0	30	Planned Outage	Injection - USM Validations(Day 1)	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000800_001	Active	Planned	Withdrawal unavailability	2023-09-05T09:51:43+01:00	2023-09-27T08:00:00+01:00	2023-09-27T17:00:00+01:00	GWh/d	130	0	130	Planned Outage	Gas Analytical Validations	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000787_002	Inactive	Planned	Withdrawal unavailability	2023-08-30T16:30:45+01:00	2023-08-30T08:00:00+01:00	2023-08-30T16:15:00+01:00	GWh/d	130	0	130	Planned Outage	Chromatograph works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000787_001	Dismissed	Planned	Withdrawal unavailability	2023-07-21T07:53:47+01:00	2023-08-30T08:00:00+01:00	2023-09-01T18:00:00+01:00	GWh/d	130	0	130	Planned Outage	Chromatograph works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000798_002	Inactive	Planned	Injection unavailability	2023-08-30T16:27:14+01:00	2023-08-30T09:50:00+01:00	2023-08-30T16:15:00+01:00	GWh/d	0	30	30	Planned Outage	ESD testing	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000798_001	Dismissed	Planned	Injection unavailability	2023-08-30T09:48:05+01:00	2023-08-30T09:50:00+01:00	2023-08-30T18:00:00+01:00	GWh/d	0	30	30	Planned Outage	ESD testing	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000790_002	Dismissed	Planned	Injection unavailability	2023-08-30T09:46:25+01:00	2023-08-31T08:00:00+01:00	2023-08-31T16:00:00+01:00	GWh/d	30	0	30	Planned Outage	ESD Testing	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000790_001	Dismissed	Planned	Injection unavailability	2023-08-01T09:18:34+01:00	2023-08-31T08:00:00+01:00	2023-08-31T16:00:00+01:00	GWh/d	30	0	30	Planned Outage	ESD Testing	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000784_003	Inactive	Planned	Storage unavailability	2023-08-25T06:02:32+01:00	2023-07-31T05:00:00+01:00	2023-08-25T04:59:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Planned Outage	Cavity 7 Intervention Works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000784_002	Dismissed	Planned	Storage unavailability	2023-07-19T16:54:44+01:00	2023-07-31T05:00:00+01:00	2023-08-25T04:59:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Planned Outage	Cavity 7 Intervention Works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000784_001	Dismissed	Planned	Storage unavailability	2023-07-17T12:03:37+01:00	2023-07-24T05:00:00+01:00	2023-08-18T18:00:00+01:00	TWh	0.317415066	3.151229634	3.4686447	Planned Outage	Cavity 7 Intervention Works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000795_001	Active	Unplanned	Storage unavailability	2023-08-21T14:49:04+01:00	2024-09-02T05:00:00+01:00	2024-10-11T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3.	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000794_001	Active	Unplanned	Storage unavailability	2023-08-21T14:43:47+01:00	2024-05-02T05:00:00+01:00	2024-06-11T18:00:00+01:00	TWh	0.4123	2.7498642	3.1621642	Planned Outage	Loss of Ald 3	21YGB-UKGASGRIDW	55WALDBOROUGH00H	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000785_002	Dismissed	Planned	Storage unavailability	2023-08-17T13:50:19+01:00	2023-08-25T05:00:00+01:00	2023-09-19T18:00:00+01:00	TWh	0.48312084	2.98552386	3.4686447	Planned Outage	Cavity 8 Intervention works	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000785_001	Dismissed	Planned	Storage unavailability	2023-07-17T12:08:57+01:00	2023-08-25T05:00:00+01:00	2023-09-19T18:00:00+01:00	TWh	0.48312084	2.98552386	3.4686447	Planned Outage	Cavity 8 Intervention works	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_000000000000000000788_001	Dismissed	Planned	Withdrawal unavailability	2023-07-21T15:24:47+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_000000000000000000789_004	Inactive	Planned	Withdrawal unavailability	2023-08-01T16:06:37+01:00	2023-08-01T05:00:00+01:00	2023-08-01T16:05:00+01:00	GWh/d	130	0	130	Planned Outage	Fuel Gas pipework repair.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000789_003	Dismissed	Planned	Withdrawal unavailability	2023-07-27T11:20:37+01:00	2023-08-01T05:00:00+01:00	2023-08-01T18:00:00+01:00	GWh/d	130	0	130	Planned Outage	Fuel Gas pipework repair.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000789_002	Dismissed	Planned	Withdrawal unavailability	2023-07-27T11:18:44+01:00	2023-08-01T05:00:00+01:00	2023-08-01T18:00:00+01:00	GWh/d	100	0	130	Planned Outage	Fuel Gas pipework repair.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Atwick	ATW_000000000000000000789_001	Dismissed	Planned	Withdrawal unavailability	2023-07-27T11:12:08+01:00	2023-08-01T05:00:00+01:00	2023-08-01T18:00:00+01:00	GWh/d	70	0	130	Planned Outage	Fuel Gas pipework repair.	21YGB-UKGASGRIDW	55WATWICK-SSE00J	SSE Hornsea Ltd	A0001033U.UK
Aldbrough	ALD_000000000000000000479_004	Active	Planned	Injection unavailability	2023-07-25T08:42:49+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

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.