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Hewett Area, Southern North Sea - Subsea Pipeline Decommissioning Consultation
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PUBLIC NOTICE
The Petroleum Act 1998
HEWETT AREA SUBSEA PIPELINES DECOMMISSIONING PROGRAMMES
Eni UK Limited has submitted for the consideration of the Secretary of State for Energy Security and Net Zero, draft decommissioning programmes for the Hewett Area Subsea Pipelines, in accordance with the provisions of the Petroleum Act 1998. It is a requirement of the Act that interested parties be consulted on such decommissioning proposals.
The subsea pipelines covered by the decommissioning programmes for the Hewett Area are:
- PL20 30” Export Pipeline
- PL21 30” Export Pipeline
- PL83 24" Production Pipeline
- PL84 24" Production Pipeline
- PL85 24" Production Pipeline
- PL86 10.75” Production Pipeline
- PL135.1 2.375” Service Pipeline
- PL135.2 2.375” Service Pipeline
- PL446 6” NB Flexible Jumper
- PL446.1 2” NB Flexible Jumper
- PL1177 8" Production Pipeline
- PLU4688 3.3” OD Control Umbilical
- PLU4689 2.98" OD Hydraulic Umbilical
- PLU4690 2.98" OD Hydraulic Umbilical
- U30-8 Redundant Hydraulic Umbilical
- PL1173 8" Production Pipeline
- PL1174.1 4.9" OD Elec Hydraulic CI Umbilical
- PL1174.2 4.9" OD Elec Hydraulic CI Umbilical
- PL87 8" Production Pipeline
- PL136.1 2.375” Service Pipeline
- PL136.2 2.375” Service Pipeline
- PLU4743 2.95" OD Hydraulic Umbilical
- PL1324 4.72” OD Electro Hydraulic CI Umbilical Jumper
- PL1325 8” NB Flexible Jumper
- PL584 10.75” Production Pipeline
- PL1323 5.16” OD Electro Hydraulic CI Umbilical
- PL585 Redundant Hydraulic CI Umbilical
- PL586 Redundant Hydraulic CI Umbilical
- PL1629.1 16.43” OD Electro Hydraulic CI Umbilical Jumper
- PL1629.2 16.43” OD Electro Hydraulic CI Umbilical Jumper
- PL1629.3 16.43” OD Electro Hydraulic CI Umbilical Jumper
- PL1629.4 16.43” OD Electro Hydraulic CI Umbilical Jumper
- PL1630 8” NB Flexible Jumper
The pipelines, umbilicals and flexible jumpers formerly connected the subsea wells, Hewett platforms and the Bacton Terminal onshore.
The Hewett field is located in Blocks 48/28a, 48/30a, 48/29a, 52/4a and 52/5a of the UKCS in the Southern North Sea, approximately 22km north-east of the Norfolk coast.
A digital copy of the Hewett Platforms Decommissioning Programmes can be viewed and downloaded online at:
https://www.gov.uk/guidance/oil-and-gas-decommissioning-of-offshore-installations-and-pipelines
A hard copy of the programme can be obtained by contacting Megan Harris on the contact details below.
Representations regarding Hewett Area Subsea Pipelines Decommissioning Programmes should be submitted in writing or electronically to the following address where they should be received by the 23 September 2026 and should state the grounds upon which any representations are being made.
Hewett Decommissioning Project Team
Eni UK Limited
Llaneurgain House,
Northop Country Park,
Flintshire,
CH7 6WD
Tel: 01352 842200
Email: Megan.Harris@external.eni.com
Date: 26th August 2026
Open to feedback
From
26-Aug-2026
To
23-Sept-2026
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