<div id="readability-page-1">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.<div><table><tbody><tr><td>OPERATOR</td><td>LOCATION</td><td>OUTAGE DATES</td><td>OUTAGE DESCRIPTION/IMPACT</td></tr><tr><td>2021 OUTAGES</td><td></td><td></td><td></td></tr><tr><td>Fluxys</td><td>Interconnector</td><td>Jul 6, 0600 CET - Mar 31, 2028 0600 CET</td><td>UK import capacity reduction to 31,392,673 kWh/h; unplanned equipment maintenance</td></tr><tr><td>2024 OUTAGES</td><td></td><td></td><td></td></tr><tr><td>SSE </td><td>Atwick</td><td>Apr 9, 2024 0850 BST- Jun 25, 2026 0500 BST</td><td>50 GWh/d planned withdrawal unavailability; phase 6 reduction</td></tr><tr><td>Kistos Energy Storage </td><td>Hole House </td><td>Jul 06, 2024 1359 BST - Mar 31, 2026 1359 BST </td><td>0.5231 TWh Planned other unavailabilityHole 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.</td></tr><tr><td>2025 OUTAGES</td><td></td><td></td><td></td></tr><tr><td>INEOS </td><td>FPS system</td><td>Q2 (Apr)</td><td>Train 1 pit stop is planned, with forecast duration of two to three (2-3) weeks</td></tr><tr><td>INEOS </td><td>FPS system</td><td>Q3</td><td>Hound Point 1 Outage is being planned, with forecast duration of two to three (2-3) weeks</td></tr><tr><td>Spirit Energy</td><td>Barrow (North Terminal)</td><td>Sep 07, 0100 BST - Dec 24, 0600 BST </td><td>6 mcm/d planned unavailability</td></tr><tr><td>SSE </td><td>Aldbrough</td><td>Nov 21, 1643 BST - Jan 8 2026, 1800 BST</td><td>144.45 GWh/d; unplanned injection unavailability</td></tr><tr><td>INEOS </td><td>FPS system</td><td>4Q (25 November)</td><td>A Train 3 TAR is planned for 4Q (25 November), with a current forecast duration of twelve (12) weeks taking it into 2026</td></tr><tr><td>TAQA</td><td>UGS Bergermeer</td><td>Dec 01, 0500 CET - Dec 20, 0500 CET</td><td>31-41 GWh/d; compressor station unavailability</td></tr><tr><td>TAQA </td><td>UGS Bergermeer</td><td>Dec 15, 0500 CET - Dec 17, 0500 CET</td><td>12 GWh/d; compressor station unavailability</td></tr><tr><td>2026 OUTAGES</td><td></td><td></td><td></td></tr><tr><td>Gassco </td><td>Karsto</td><td>Jan 05, 0600 CET - Jan 14, 0600 CET</td><td>-15.6 mcm/d; Yearly maintenance</td></tr><tr><td>Gassco </td><td>Aasta Hansteen </td><td>Jan 06, 0600 CET - Jan 07, 0600 CET</td><td>10.0 mcm/d; Yearly maintenance</td></tr><tr><td>SSE </td><td>Aldbrough</td><td>Mar 12, 0500 BST - Mar 31, 1800 BST </td><td>0.323 TWh to 0.432 TWh; Planned storage unavailability</td></tr><tr><td>SSE </td><td>Aldbrough</td><td>Mar 18, 0500 BST - Mar 29, 1800 BST </td><td>0.41 TWh; Planned storage unavailability</td></tr><tr><td>Gassco </td><td>Kristin</td><td>Mar 11, 0500 CET - Mar 13, 1800 CET </td><td>-11.9 mcm/d; yearly maintenance</td></tr><tr><td>TAQA </td><td>UGS Bergermeer</td><td>Mar 17, 0500 CET - Apr 04, 0400 CET</td><td>12-17 GWh/d; compressor station unavailability</td></tr><tr><td>Gassco </td><td>Aasta Hansteen</td><td>Mar 19, 0600 CET - Mar 23, 0600 CET</td><td>20.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Nyhamna</td><td>Mar 15, 0600 CET - Mar 22, 0600 CET</td><td>50.8 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Troll </td><td>Mar 20, 0600 CET - May 28, 0600 CET </td><td>-14.0 to 127.4 mcm/d; yearly maintenance </td></tr><tr><td>Gassco </td><td>Troll</td><td>Apr 09, 0600 CET - Jun 19, 0600 CET </td><td>13.0 to 130.4 mcm/d; yearly maintenance</td></tr><tr><td>SSE </td><td>Atwick</td><td>Apr 09, 0850 BST - Jun 25, 0500 BST </td><td>45 - 50 GWH/d; planned withdrawal unavailability</td></tr><tr><td>Gassco </td><td>Kollsnes</td><td>Apr 16, 0600 CET - Jun 21, 0600 CET </td><td>36.0-156.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>St Fergus</td><td>Apr 17, 0600 CET - Apr 24, 0600 CET </td><td>-19.8 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Troll</td><td>Apr 23, 0600 CET - May 20, 0600 CET </td><td>-14.0 to 20.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Oseberg</td><td>May 01, 0600 CET - May 29, 0600 CET </td><td>27.5 mcm/d; yearly maintenance</td></tr><tr><td>Gassco</td><td>Hammerfest LNG - Melkøya</td><td>May 01, 0600 CET - May 03, 0600 CET </td><td>18.4 mcm/d; yearly maintenance</td></tr><tr><td>Gassco</td><td>Emden</td><td>May 04, 0600 CET - May 09, 0600 CET</td><td>20.1 mcm/d; yearly maintenance</td></tr><tr><td>Gassco +</td><td>Easington</td><td>May 06, 0600 CET - May 07, 0600 CET</td><td>43.8 mcm/d; yearly maintenance</td></tr><tr><td>Spirit Energy </td><td>Barrow (North Terminal)</td><td>May 06, 0600 BST - Jun 20, 0600 BST</td><td>6.0 mcm/d; planned annual terminal maintenance</td></tr><tr><td>Storengy UK </td><td>Stublach</td><td>May 07, 0500 BST- May 23, 0459 BST</td><td>182,000,000 kWh/d planned unavailability</td></tr><tr><td>Gassco </td><td>Kollsnes</td><td>May 11, 0600 CET - May 13, 0600 CET </td><td>-38.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Gullfaks</td><td>May 12, 0600 CET - May 14, 0600 CET</td><td>11.2 mcm/d; yearly maintenance</td></tr><tr><td>Gassco +</td><td>Dunkerque </td><td>May 20, 0600 CET - May 21, 0600 CET</td><td>27.7 mcm/d; yearly ESD test</td></tr><tr><td>Gassco </td><td>Troll</td><td>May 20, 0600 CET - May 22, 0600 CET</td><td>-37 to -125.4 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Visund</td><td>May 20, 0600 CET - May 22, 0300 CET</td><td>13.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Kollsnes</td><td>May 21, 0600 CET - May 22, 0600 CET </td><td>88.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Nyhamna</td><td>May 25, 0600 CET - May 29, 0600 CET</td><td>14.8 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Ormen Lange</td><td>May 25, 0600 CET - May 29, 0600 CET</td><td>13.1 mcm/d; yearly maintenance</td></tr><tr><td>TAQA </td><td>UGS Bergermeer</td><td>May 29, 0400 CET - June 22, 0400 CET</td><td>168 to 185 GWh/d; gas treatment plant unavailability</td></tr><tr><td>Gassco </td><td>Troll</td><td>May 30, 0600 CET - Jun 07, 0600 CET</td><td>-42.4 to -16 mcm/d; Yearly maintenance</td></tr><tr><td>Gassco </td><td>Nyhamna</td><td>Jun 01, 0600 CET - Jun 05, 0600 CET</td><td>14.8 mcm/d; yearly maintenance</td></tr><tr><td>Perenco </td><td>Dimlington</td><td>Jun 01, 0600 BST - Jun 15, 0600 BST</td><td>4.8 mcm/d; planned maintenance shutdown</td></tr><tr><td>Gassco</td><td>Fields delivering into SEGAL</td><td>Jun 02, 0600 CET - Jun 09, 0600 CET</td><td>-13.9 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Ormen Lange</td><td>Jun 04, 0600 CET - Jun 05, 0600 CET</td><td>11.7 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Nyhamna</td><td>Jun 04, 0600 CET - Jun 05, 0600 CET</td><td>49.8 mcm/d; yearly maintenance</td></tr><tr><td>Gassco</td><td>Hammerfest LNG - Melkøya</td><td>Jun 04, 0600 CET - Jun 10, 0600 CET</td><td>18.4 mcm/d; yearly maintenance</td></tr><tr><td>TAQA </td><td>UGS Bergermeer</td><td>Jun 06, 0400 CET - Nov 01, 0500 CET</td><td>41 to 497 GWh/d; gas treatment plant unavailability</td></tr><tr><td>Gassco </td><td>St Fergus</td><td>Jun 08, 0600 CET - Aug 15, 0600 CET</td><td>-18.8 mcm/d; yearly maintenance</td></tr><tr><td>Gassco</td><td>Visund</td><td>Jun 09, 0600 CET - Jun 11, 0600 CET</td><td>-15.1 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Nyhamna</td><td>Jun 09, 0600 CET - Jun 13, 0600 CET</td><td>14.8 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Zeebrugge</td><td>Jun 11, 0600 CET - Jun 13, 0600 CET</td><td>12.2 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Troll</td><td>Jun 11, 0600 CET - Jun 19, 0600 CEt </td><td>16.0 - 42.4 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Kollsnes</td><td>Jun 11, 0600 CET - Jun 21, 0600 CET </td><td>38.0 - 43.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Nyhamna</td><td>Jun 16, 0600 CET - Jun 20, 0600 CET</td><td>14.8 mcm/d; yearly maintenance </td></tr><tr><td>SSE </td><td>Aldbrough</td><td>Jul 09, 0500 BST - Jul 14, 1800 BST</td><td>0.16 TWh; planned storage unavailability</td></tr><tr><td>SSE </td><td>Atwick</td><td>Jul 16, 1800 BST - Sep 01, 0500 BST</td><td>100 GWh/d; planned withdrawal unavailability</td></tr><tr><td>SSE </td><td>Aldbrough</td><td>Jul 18, 0500 BST - Jul 23, 1800 BST</td><td>0.41 TWh; planned storage unavailability</td></tr><tr><td>SSE </td><td>Aldbrough</td><td>Jul 27, 0500 BST - Aug 08, 1800 BST</td><td>0.33 TWh; planned storage unavailability</td></tr><tr><td>Perenco </td><td>Bacton</td><td>Aug 01, 0600 BST - Aug 20, 0600 BST</td><td>8.8 mcm/d; planned maintenance shutdown</td></tr><tr><td>SSE </td><td>Aldbrough</td><td>Aug 11, 0500 BST - Oct 01, 1800 BST</td><td>0.44 TWh; planned storage unavailability</td></tr><tr><td>Gassco</td><td>Sleipner</td><td>Aug 28, 0600 CET - Sep 22, 0600 CET </td><td>-13.1 mcm/d; yearly maintenance</td></tr><tr><td>Gassco</td><td>Kollsnes</td><td>Aug 12, 0600 CET - Sep 22, 0600 CET </td><td>16.0-40.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Troll</td><td>Aug 29, 0600 CET - Sep 16, 0600 CET </td><td>-13.0 mcm/d; yearly maintenance</td></tr><tr><td>Fluxys </td><td>Interconnector</td><td>Sep 1 - Sep 20</td><td>Planned maintenance shutdown </td></tr><tr><td>Gassco +</td><td>Easington</td><td>Sep 01, 0600 CET - Sep 02, 0600 CET</td><td>42.7 mcm/d; yearly ESD test</td></tr><tr><td>SSE</td><td>Atwick</td><td>Sep 01, 0500 BST - Sep 08, 1800 BST </td><td>30 GWh/d; Planned injection unavailability</td></tr><tr><td>Gassco </td><td>Kollsnes</td><td>Sep 06, 0600 CET - Sep 19, 0600 CET</td><td>26.0 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Aasta Hansteen</td><td>Sep 15, 0600 CET - Sep 17, 0600 CET</td><td>-16.1 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Nyhamna</td><td>Sep 15, 0600 CET - Sep 22, 0600 CET</td><td>51,8 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Kårstø</td><td>Sep 22, 0600 CET - Sep 26, 0600 CET</td><td>19.6 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Asgard</td><td>Sep 23, 0600 CET - Sep 25, 0600 CET</td><td>-12.5;29.5 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Kristin</td><td>Sep 23, 0600 CET - Sep 29, 0600 CET</td><td>11.9 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Skarv</td><td>Sep 21, 1328 CET - Sep 24, 0600 CET </td><td>14.9-15.3 mcm/d; yearly maintenance</td></tr><tr><td>BBL company </td><td>BBL pipeline</td><td>Sep 30, 0600 CET - Oct 15, 0600 CET</td><td>Planned maintenance</td></tr><tr><td>Gassco</td><td>Oseberg</td><td>Sep 23, 0600 CET - Sep 30, 0600 CET</td><td>-13.5 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Aasta Hansteen</td><td>Sep 29, 0600 CET - Oct 03, 0600 CET</td><td>17.7 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Zeebrugge</td><td>Sep 30, 0600 CET - Oct 01, 0600 CET</td><td>22.2 mcm/d; yearly maintenance</td></tr><tr><td>TAQA </td><td>UGS Bergermeer</td><td>Oct 03, 0500 CET - Nov 02, 0500 CET</td><td>185 to 497 GWh/d; gas treatment plant unavailability</td></tr><tr><td>Gassco</td><td>Oseberg</td><td>Oct 10, 0600 CET - Oct 23, 0600 CET</td><td>-27.5 mcm/d; yearly maintenance</td></tr><tr><td>Gassco </td><td>Aasta Hansteen</td><td>Oct 15, 0600 CET - Oct 19, 0600 CET</td><td>20.7 mcm/d; yearly mainetenance</td></tr><tr><td>SSE </td><td>Aldbrough</td><td>Oct 25, 0500 BST - Oct 31, 1800 BST</td><td>97.78 GWh/d; planned injection unavailability</td></tr><tr><td>Gassco</td><td>Visund</td><td>Dec 01, 0600 CET - Dec 02, 0600 CET</td><td>-14.8 mcm/d; yearly maintenance</td></tr><tr><td>INEOS </td><td>FPS system</td><td>2026</td><td>The annual Unity ESDV closure test, Cruden Bay NGL ESDV leak test, and Forties Charlie equipment tests will take place (3Q- Aug 4); the Old Lock Berth Outage will take place (2Q)</td></tr></tbody></table></div></div>

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The schedule outlines maintenance work on North Sea gas infrastructure, detailing outages from 2021 to 2026. Key outages include reductions in UK import capacity, planned and unplanned maintenance, and storage unavailability. Notable operators involved are Fluxys, SSE, Kistos Energy, INEOS, Spirit Energy, TAQA, and Gassco. Specific locations and dates for each outage are provided, with impacts measured in standard million cubic metres per day (mcm/d) or gigawatt-hours per day (GWh/d).

North Sea gas maintenance schedule: Adds Easington outage