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Table: North Sea gas maintenance schedule: Adds TGPP outage

SSE

24/11/2025 08:04

Nov 24 (Reuters) - The following is a schedule of maintenance work on gas infrastructure, mainly in the North Sea.

The table is arranged by outage start date.

Volumes are in standard million cubic metres per day (mcm/d) or gigawatt-hours per day (GWh/d) unless otherwise indicated.

OPERATOR LOCATION OUTAGE DATES OUTAGE DESCRIPTION/IMPACT
2021 OUTAGES 
Fluxys Interconnector Jul 6, 0600 CET - Mar 31, 2028 0600 CET UK import capacity reduction to 31,392,673 kWh/h; unplanned equipment maintenance
2024 OUTAGES 
SSE Atwick Apr 9, 2024 0850 BST- Jun 26, 2026 0500 BST 45 GWh/d planned withdrawal unavailability; phase 6 reduction
Kistos Energy Storage Hole House Jul 06, 2024 1359 BST - Mar 31, 2026 1359 BST 0.5231 TWh Planned other unavailability
Hole House Gas Storage facility will not be returned to commercial operation. The plant will still be required to do gas withdrawals and small injections during the decommissioning process, which will be completed by the end date specified.
2025 OUTAGES 
INEOS FPS system Q2 (Apr) Train 1 pit stop is planned, with forecast duration of two to three (2-3) weeks
INEOS FPS system Q3 Hound Point 1 Outage is being planned, with forecast duration of two to three (2-3) weeks
Spirit Energy Barrow (North Terminal) Sep 07, 0100 BST - Dec 11, 0600 BST 6 mcm/d planned unavailability
Scottish Power Hatfield Sep 14, 0400 BST - Nov 28, 1700 BST 27 GWh/d planned injection unavailability; 20GWh/d
planned withdrawal unavailability
Gassco Kollsnes Sep 19, 0600 CET - Nov 21, 0600 CET 10 mcm/d; planned maintenance- Failure – external power supply
SSE Aldbrough Oct 28, 0500 BST - Nov 25, 1800 BST 144.45 - 293.33 GWh/d; planned storage unavailability
SSE Atwick Nov 07, 1600 BST- Dec 04, 1800 BST 0.3907 GWh/d; planned storage unavailability
SSE # Atwick Nov 10, 0800 BST- Nov 24, 1600 BST 0.629 GWh/d; planned storage unavailability
SSE # Aldbrough Nov 21, 0343 BST - Dec 03, 0500 BST 144.45 GWh/d; unplanned injection unavailability
Total EP UK Tesside CATS Nov 18, 2100 BST - Nov 19, 0600 BST 43 GWh/d; unplanned gas production field unavailability
Gassco Troll Nov 19, 0600 CET - Nov 21, 0600 CET 12-130.6 mcm/d; Yearly maintenance
Gassco Kårstø Nov 19, 0600 CET - Nov 21, 0600 CET 15.6 mcm/d; yearly maintenance
Gassco Nyhamna Nov 17, 0600 CET - Dec 01, 0600 CET 19.8 mcm/d; yearly maintenance
Gassco # Kårstø Nov 20, 0600 CET - Nov 25, 0600 CET 12.6 mcm/d; yearly maintenance
NSMP + TGPP Nov 23; Estimated duration 50 hours Unplanned/technical issues
Kistos Energy Storage Ltd Hill Top Nov 24, 0500 BST- Nov 24, 1800 BST 0.6477 TWh; Planned storage unavailability
INEOS FPS system 4Q (25 November) A Train 3 TAR is planned for 4Q (25 November), with a current forecast duration of twelve (12) weeks taking it into 2026
Gassco Visund Dec 03, 0600 CET - Dec 04, 0600 CET 14.0 mcm/d; yearly maintenance
TAQA UGS Bergermeer Dec 01, 0500 CET - Dec 20, 0500 CET 31-38 GWh/d; compressor station unavailability
2026 OUTAGES 
Gassco Karsto Jan 05, 0600 CET - Jan 14, 0600 CET -15.6 mcm/d; Yearly maintenance
SSE Aldbrough Mar 12, 0500 BST - Mar 31, 1800 BST 0.323 TWh to 0.432 TWh; Planned storage unavailability
SSE Aldbrough Mar 18, 0500 BST - Mar 29, 1800 BST 0.41 TWh; Planned storage unavailability
Gassco Kristin Mar 11, 0500 CET - Mar 13, 1800 CET -11.9 mcm/d; yearly maintenance
TAQA # UGS Bergermeer Mar 17, 0500 CET - Apr 04, 0400 CET 12-17 GWh/d; compressor station unavailability
Gassco Aasta Hansteen Mar 18, 0600 CET - Mar 25, 0600 CET -20.0 mcm/d; yearly maintenance
Gassco Nyhamna Mar 15, 0600 CET - Mar 22, 0600 CET 50.8 mcm/d; yearly maintenance
Gassco Troll Mar 20, 0600 CET - May 28, 0600 CET -14.0 to 127.4 mcm/d; yearly maintenance
Gassco Troll Apr 09, 0600 CET - Apr 23, 0600 CET -14.0 to 99.0 mcm/d; yearly maintenance
SSE Atwick Apr 09, 0850 BST - Jun 25, 0500 BST 45 - 50 GWH/d; planned withdrawal unavailability
Gassco Kollsnes Apr 16, 0600 CET - May 07, 0600 CET 38.0-43.0 mcm/d; yearly maintenance
Gassco St Fergus Apr 17, 0600 CET - Apr 24, 0600 CET -19.8 mcm/d; yearly maintenance
Gassco Troll Apr 23, 0600 CET - May 20, 0600 CET -14.0 to 20.0 mcm/d; yearly maintenance
Gassco Oseberg May 01, 0600 CET - May 29, 0600 CET 27.5 mcm/d; yearly maintenance
Gassco Hammerfest LNG - Melkøya May 01, 0600 CET - May 03, 0600 CET 18.4 mcm/d; yearly maintenance
Gassco Emden May 04, 0600 CET - May 09, 0600 CET 20.1 mcm/d; yearly maintenance
Spirit Energy Barrow (North Terminal) May 06, 0600 BST - Jun 20, 0600 BST 6.0 mcm/d; planned annual terminal maintenance
Storengy UK Stublach May 07, 0500 BST- May 23, 0459 BST 182,000,000 kWh/d planned unavailability
Gassco Kollsnes May 11, 0600 CET - May 13, 0600 CET -38.0 mcm/d; yearly maintenance
Gassco Gullfaks May 12, 0600 CET - May 14, 0600 CET 11.2 mcm/d; yearly maintenanct
Gassco Troll May 20, 0600 CET - May 22, 0600 CET -37 to -125.4 mcm/d; yearly maintenance
Gassco Visund May 20, 0600 CET - May 22, 0300 CET 13.0 mcm/d; yearly maintenance
Gassco Kollsnes May 21, 0600 CET - May 22, 0600 CET 88.0 mcm/d; yearly maintenance
Gassco Nyhamna May 25, 0600 CET - May 29, 0600 CET 14.8 mcm/d; yearly maintenance
Gassco Ormen Lange May 25, 0600 CET - May 29, 0600 CET 13.1 mcm/d; yearly maintenance
Gassco Troll May 30, 0600 CET - Jun 07, 0600 CET -42.4 to -16 mcm/d; Yearly maintenance
Gassco Nyhamna Jun 01, 0600 CET - Jun 05, 0600 CET 14.8 mcm/d; yearly maintenance
Perenco Dimlington Jun 01, 0600 BST - Jun 15, 0600 BST 4.8 mcm/d; planned maintenance shutdown
Gassco Fields delivering into SEGAL Jun 02, 0600 CET - Jun 09, 0600 CET -13.9 mcm/d; yearly maintenance
Gassco Ormen Lange Jun 04, 0600 CET - Jun 05, 0600 CET 11.7 mcm/d; yearly maintenance
Gassco Nyhamna Jun 04, 0600 CET - Jun 05, 0600 CET 49.8 mcm/d; yearly maintenance
Gassco Hammerfest LNG - Melkøya Jun 04, 0600 CET - Jun 10, 0600 CET 18.4 mcm/d; yearly maintenance
Gassco St Fergus Jun 08, 0600 CET - Aug 15, 0600 CET -18.8 mcm/d; yearly maintenance
Gassco Visund Jun 09, 0600 CET - Jun 11, 0600 CET -15.1 mcm/d; yearly maintenance
Gassco Nyhamna Jun 09, 0600 CET - Jun 13, 0600 CET 14.8 mcm/d; yearly maintenance
Gassco + Zeebrugge Jun 11, 0600 CET - Jun 13, 0600 CET 12.2 mcm/d; yearly maintenance
Gassco Troll Jun 11, 0600 CET - Jun 19, 0600 CEt 16.0 - 42.4 mcm/d; yearly maintenance
Gassco Kollsnes Jun 11, 0600 CET - Jun 21, 0600 CET 38.0 - 43.0 mcm/d; yearly maintenance
Gassco Nyhamna Jun 16, 0600 CET - Jun 20, 0600 CET 14.8 mcm/d; yearly maintenance
SSE Aldbrough Jul 09, 0500 BST - Jul 14, 1800 BST 0.16 TWh; planned storage unavailability
SSE Atwick Jul 16, 1800 BST - Sep 01, 0500 BST 100 GWh/d; planned withdrawal unavailability
SSE Aldbrough Jul 18, 0500 BST - Jul 23, 1800 BST 0.41 TWh; planned storage unavailability
SSE Aldbrough Jul 27, 0500 BST - Aug 08, 1800 BST 0.33 TWh; planned storage unavailability
Perenco Bacton Aug 01, 0600 BST - Aug 20, 0600 BST 8.8 mcm/d; planned maintenance shutdown
SSE Aldbrough Aug 11, 0500 BST - Oct 01, 1800 BST 0.44 TWh; planned storage unavailability
Gassco Sleipner Aug 28, 0600 CET - Sep 22, 0600 CET -13.1 mcm/d; yearly maintenance
Gassco Kollsnes Aug 29, 0600 CET - Sep 19, 0600 CET 18.0-42.0 mcm/d; yearly maintenance
Gassco Troll Aug 29, 0600 CET - Sep 16, 0600 CET -13.0 mcm/d; yearly maintenance
Fluxys Interconnector Sep 1 - Sep 20 Planned maintenance shutdown
SSE Atwick Sep 01, 0500 BST - Sep 08, 1800 BST 30 GWh/d; Planned injection unavailability
Gassco Kollsnes Sep 06, 0600 CET - Sep 19, 0600 CET 26.0 mcm/d; yearly maintenance
Gassco Aasta Hansteen Sep 15, 0600 CET - Sep 17, 0600 CET -16.1 mcm/d; yearly maintenance
Gassco Nyhamna Sep 15, 0600 CET - Sep 22, 0600 CET 51,8 mcm/d; yearly maintenance
Gassco Kårstø Sep 22, 0600 CET - Sep 26, 0600 CET 19.6 mcm/d; yearly maintenance
Gassco # Asgard Sep 23, 0600 CET - Sep 25, 0600 CET -12.5;29.5 mcm/d; yearly maintenance
Gassco Kristin Sep 23, 0600 CET - Sep 29, 0600 CET 11.9 mcm/d; yearly maintenance
Gassco Skarv Sep 21, 1328 CET - Sep 23, 0600 CET 15.3 mcm/d; yearly maintenance
BBL company BBL pipeline Sep 21 - Oct 19 Planned maintenance
Gassco Oseberg Sep 23, 0600 CET - Sep 30, 0600 CET -13.5 mcm/d; yearly maintenance
Gassco Oseberg Oct 10, 0600 CET - Oct 23, 0600 CET -27.5 mcm/d; yearly maintenance
Gassco Aasta Hansteen Oct 15, 0600 CET - Oct 19, 0600 CET 20.7 mcm/d; yearly mainetenance
SSE Aldbrough Oct 25, 0500 BST - Oct 31, 1800 BST 97.78 GWh/d; planned injection unavailability
Gassco Visund Dec 01, 0600 CET - Dec 02, 0600 CET -14.8 mcm/d; yearly maintenance
INEOS FPS system 2026 The annual Unity ESDV closure test, Cruden Bay NGL ESDV leak test, and Forties Charlie equipment tests will take place; the Old Lock Berth Outage will take place

NOTES:

To see all Gassco outages, please click https://bit.ly/3rQojCd

CET - Central European Time (GMT +1 or GMT +2, depending on time of the year)

*  Capacity loss attributable to separate caverns

+  indicates new addition

#  indicates revision

 (Reporting by Noel John in Bengaluru)

 ((Noel.John@thomsonreuters.com;))

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Table: North Sea gas maintenance schedule: Adds TGPP outage

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OPERATOR	LOCATION	OUTAGE DATES	OUTAGE DESCRIPTION/IMPACT

2021 OUTAGES

Fluxys	Interconnector	Jul 6, 0600 CET - Mar 31, 2028 0600 CET	UK import capacity reduction to 31,392,673 kWh/h; unplanned equipment maintenance

2024 OUTAGES

SSE	Atwick	Apr 9, 2024 0850 BST- Jun 26, 2026 0500 BST	45 GWh/d planned withdrawal unavailability; phase 6 reduction
Kistos Energy Storage	Hole House	Jul 06, 2024 1359 BST - Mar 31, 2026 1359 BST	0.5231 TWh Planned other unavailability Hole House Gas Storage facility will not be returned to commercial operation. The plant will still be required to do gas withdrawals and small injections during the decommissioning process, which will be completed by the end date specified.

2025 OUTAGES

INEOS	FPS system	Q2 (Apr)	Train 1 pit stop is planned, with forecast duration of two to three (2-3) weeks
INEOS	FPS system	Q3	Hound Point 1 Outage is being planned, with forecast duration of two to three (2-3) weeks
Spirit Energy	Barrow (North Terminal)	Sep 07, 0100 BST - Dec 11, 0600 BST	6 mcm/d planned unavailability
Scottish Power	Hatfield	Sep 14, 0400 BST - Nov 28, 1700 BST	27 GWh/d planned injection unavailability; 20GWh/d planned withdrawal unavailability
Gassco	Kollsnes	Sep 19, 0600 CET - Nov 21, 0600 CET	10 mcm/d; planned maintenance- Failure – external power supply
SSE	Aldbrough	Oct 28, 0500 BST - Nov 25, 1800 BST	144.45 - 293.33 GWh/d; planned storage unavailability
SSE	Atwick	Nov 07, 1600 BST- Dec 04, 1800 BST	0.3907 GWh/d; planned storage unavailability
SSE #	Atwick	Nov 10, 0800 BST- Nov 24, 1600 BST	0.629 GWh/d; planned storage unavailability
SSE #	Aldbrough	Nov 21, 0343 BST - Dec 03, 0500 BST	144.45 GWh/d; unplanned injection unavailability
Total EP UK	Tesside CATS	Nov 18, 2100 BST - Nov 19, 0600 BST	43 GWh/d; unplanned gas production field unavailability
Gassco	Troll	Nov 19, 0600 CET - Nov 21, 0600 CET	12-130.6 mcm/d; Yearly maintenance
Gassco	Kårstø	Nov 19, 0600 CET - Nov 21, 0600 CET	15.6 mcm/d; yearly maintenance
Gassco	Nyhamna	Nov 17, 0600 CET - Dec 01, 0600 CET	19.8 mcm/d; yearly maintenance
Gassco #	Kårstø	Nov 20, 0600 CET - Nov 25, 0600 CET	12.6 mcm/d; yearly maintenance
NSMP +	TGPP	Nov 23; Estimated duration 50 hours	Unplanned/technical issues
Kistos Energy Storage Ltd	Hill Top	Nov 24, 0500 BST- Nov 24, 1800 BST	0.6477 TWh; Planned storage unavailability
INEOS	FPS system	4Q (25 November)	A Train 3 TAR is planned for 4Q (25 November), with a current forecast duration of twelve (12) weeks taking it into 2026
Gassco	Visund	Dec 03, 0600 CET - Dec 04, 0600 CET	14.0 mcm/d; yearly maintenance
TAQA	UGS Bergermeer	Dec 01, 0500 CET - Dec 20, 0500 CET	31-38 GWh/d; compressor station unavailability

2026 OUTAGES
Gassco	Karsto	Jan 05, 0600 CET - Jan 14, 0600 CET	-15.6 mcm/d; Yearly maintenance
SSE	Aldbrough	Mar 12, 0500 BST - Mar 31, 1800 BST	0.323 TWh to 0.432 TWh; Planned storage unavailability
SSE	Aldbrough	Mar 18, 0500 BST - Mar 29, 1800 BST	0.41 TWh; Planned storage unavailability
Gassco	Kristin	Mar 11, 0500 CET - Mar 13, 1800 CET	-11.9 mcm/d; yearly maintenance
TAQA #	UGS Bergermeer	Mar 17, 0500 CET - Apr 04, 0400 CET	12-17 GWh/d; compressor station unavailability
Gassco	Aasta Hansteen	Mar 18, 0600 CET - Mar 25, 0600 CET	-20.0 mcm/d; yearly maintenance
Gassco	Nyhamna	Mar 15, 0600 CET - Mar 22, 0600 CET	50.8 mcm/d; yearly maintenance
Gassco	Troll	Mar 20, 0600 CET - May 28, 0600 CET	-14.0 to 127.4 mcm/d; yearly maintenance
Gassco	Troll	Apr 09, 0600 CET - Apr 23, 0600 CET	-14.0 to 99.0 mcm/d; yearly maintenance
SSE	Atwick	Apr 09, 0850 BST - Jun 25, 0500 BST	45 - 50 GWH/d; planned withdrawal unavailability
Gassco	Kollsnes	Apr 16, 0600 CET - May 07, 0600 CET	38.0-43.0 mcm/d; yearly maintenance
Gassco	St Fergus	Apr 17, 0600 CET - Apr 24, 0600 CET	-19.8 mcm/d; yearly maintenance
Gassco	Troll	Apr 23, 0600 CET - May 20, 0600 CET	-14.0 to 20.0 mcm/d; yearly maintenance
Gassco	Oseberg	May 01, 0600 CET - May 29, 0600 CET	27.5 mcm/d; yearly maintenance
Gassco	Hammerfest LNG - Melkøya	May 01, 0600 CET - May 03, 0600 CET	18.4 mcm/d; yearly maintenance
Gassco	Emden	May 04, 0600 CET - May 09, 0600 CET	20.1 mcm/d; yearly maintenance
Spirit Energy	Barrow (North Terminal)	May 06, 0600 BST - Jun 20, 0600 BST	6.0 mcm/d; planned annual terminal maintenance
Storengy UK	Stublach	May 07, 0500 BST- May 23, 0459 BST	182,000,000 kWh/d planned unavailability
Gassco	Kollsnes	May 11, 0600 CET - May 13, 0600 CET	-38.0 mcm/d; yearly maintenance
Gassco	Gullfaks	May 12, 0600 CET - May 14, 0600 CET	11.2 mcm/d; yearly maintenanct
Gassco	Troll	May 20, 0600 CET - May 22, 0600 CET	-37 to -125.4 mcm/d; yearly maintenance
Gassco	Visund	May 20, 0600 CET - May 22, 0300 CET	13.0 mcm/d; yearly maintenance
Gassco	Kollsnes	May 21, 0600 CET - May 22, 0600 CET	88.0 mcm/d; yearly maintenance
Gassco	Nyhamna	May 25, 0600 CET - May 29, 0600 CET	14.8 mcm/d; yearly maintenance
Gassco	Ormen Lange	May 25, 0600 CET - May 29, 0600 CET	13.1 mcm/d; yearly maintenance
Gassco	Troll	May 30, 0600 CET - Jun 07, 0600 CET	-42.4 to -16 mcm/d; Yearly maintenance
Gassco	Nyhamna	Jun 01, 0600 CET - Jun 05, 0600 CET	14.8 mcm/d; yearly maintenance
Perenco	Dimlington	Jun 01, 0600 BST - Jun 15, 0600 BST	4.8 mcm/d; planned maintenance shutdown
Gassco	Fields delivering into SEGAL	Jun 02, 0600 CET - Jun 09, 0600 CET	-13.9 mcm/d; yearly maintenance
Gassco	Ormen Lange	Jun 04, 0600 CET - Jun 05, 0600 CET	11.7 mcm/d; yearly maintenance
Gassco	Nyhamna	Jun 04, 0600 CET - Jun 05, 0600 CET	49.8 mcm/d; yearly maintenance
Gassco	Hammerfest LNG - Melkøya	Jun 04, 0600 CET - Jun 10, 0600 CET	18.4 mcm/d; yearly maintenance
Gassco	St Fergus	Jun 08, 0600 CET - Aug 15, 0600 CET	-18.8 mcm/d; yearly maintenance
Gassco	Visund	Jun 09, 0600 CET - Jun 11, 0600 CET	-15.1 mcm/d; yearly maintenance
Gassco	Nyhamna	Jun 09, 0600 CET - Jun 13, 0600 CET	14.8 mcm/d; yearly maintenance
Gassco +	Zeebrugge	Jun 11, 0600 CET - Jun 13, 0600 CET	12.2 mcm/d; yearly maintenance
Gassco	Troll	Jun 11, 0600 CET - Jun 19, 0600 CEt	16.0 - 42.4 mcm/d; yearly maintenance
Gassco	Kollsnes	Jun 11, 0600 CET - Jun 21, 0600 CET	38.0 - 43.0 mcm/d; yearly maintenance
Gassco	Nyhamna	Jun 16, 0600 CET - Jun 20, 0600 CET	14.8 mcm/d; yearly maintenance
SSE	Aldbrough	Jul 09, 0500 BST - Jul 14, 1800 BST	0.16 TWh; planned storage unavailability
SSE	Atwick	Jul 16, 1800 BST - Sep 01, 0500 BST	100 GWh/d; planned withdrawal unavailability
SSE	Aldbrough	Jul 18, 0500 BST - Jul 23, 1800 BST	0.41 TWh; planned storage unavailability
SSE	Aldbrough	Jul 27, 0500 BST - Aug 08, 1800 BST	0.33 TWh; planned storage unavailability
Perenco	Bacton	Aug 01, 0600 BST - Aug 20, 0600 BST	8.8 mcm/d; planned maintenance shutdown
SSE	Aldbrough	Aug 11, 0500 BST - Oct 01, 1800 BST	0.44 TWh; planned storage unavailability
Gassco	Sleipner	Aug 28, 0600 CET - Sep 22, 0600 CET	-13.1 mcm/d; yearly maintenance
Gassco	Kollsnes	Aug 29, 0600 CET - Sep 19, 0600 CET	18.0-42.0 mcm/d; yearly maintenance
Gassco	Troll	Aug 29, 0600 CET - Sep 16, 0600 CET	-13.0 mcm/d; yearly maintenance
Fluxys	Interconnector	Sep 1 - Sep 20	Planned maintenance shutdown
SSE	Atwick	Sep 01, 0500 BST - Sep 08, 1800 BST	30 GWh/d; Planned injection unavailability
Gassco	Kollsnes	Sep 06, 0600 CET - Sep 19, 0600 CET	26.0 mcm/d; yearly maintenance
Gassco	Aasta Hansteen	Sep 15, 0600 CET - Sep 17, 0600 CET	-16.1 mcm/d; yearly maintenance
Gassco	Nyhamna	Sep 15, 0600 CET - Sep 22, 0600 CET	51,8 mcm/d; yearly maintenance
Gassco	Kårstø	Sep 22, 0600 CET - Sep 26, 0600 CET	19.6 mcm/d; yearly maintenance
Gassco #	Asgard	Sep 23, 0600 CET - Sep 25, 0600 CET	-12.5;29.5 mcm/d; yearly maintenance
Gassco	Kristin	Sep 23, 0600 CET - Sep 29, 0600 CET	11.9 mcm/d; yearly maintenance
Gassco	Skarv	Sep 21, 1328 CET - Sep 23, 0600 CET	15.3 mcm/d; yearly maintenance
BBL company	BBL pipeline	Sep 21 - Oct 19	Planned maintenance
Gassco	Oseberg	Sep 23, 0600 CET - Sep 30, 0600 CET	-13.5 mcm/d; yearly maintenance
Gassco	Oseberg	Oct 10, 0600 CET - Oct 23, 0600 CET	-27.5 mcm/d; yearly maintenance
Gassco	Aasta Hansteen	Oct 15, 0600 CET - Oct 19, 0600 CET	20.7 mcm/d; yearly mainetenance
SSE	Aldbrough	Oct 25, 0500 BST - Oct 31, 1800 BST	97.78 GWh/d; planned injection unavailability
Gassco	Visund	Dec 01, 0600 CET - Dec 02, 0600 CET	-14.8 mcm/d; yearly maintenance
INEOS	FPS system	2026	The annual Unity ESDV closure test, Cruden Bay NGL ESDV leak test, and Forties Charlie equipment tests will take place; the Old Lock Berth Outage will take place