Planned road closures & management

Please find below a detailed list of road closures, speed restrictions & traffic management that is currently planned under the SZC construction process. Be aware this is being constantly updated, with access to the latest information using the link provided under 'Useful Information - Road Closures'.

Road Closures

  • Willow Marsh Lane, Darsham is closed until June 2026 to enable the construction of the Northern Park & Ride roundabout and site. Diversion in place via Walpole Road, A144, A12.

  • Reckford Road, Westleton will be closed in January & February 2026 to allow for water main repairs.

  • Abbey Lane, Leiston is closed until January 2027 to enable the construction of the new railway line. Diversions in place via Harrow Lane, Hawthorn Road and Pretty Road. 

  • Night-time closure of Abbey Road B1122 from 22 September till 31 October 20:00 – 05:00. This closure is to enable several utility diversionary works to take place, as well as other tie in works. Diversions in place for Abbey Road diversion via B1122, A12, A1094 and B1069, and via King George’s Avenue and B1122 for Lover’s Lane. Further closures of both roads are required. 

  • Full weekend closure of Abbey Road B1122 and Lovers Lane Junction from 3 October 20:00 -05:00 6 October. Diversions in place for Abbey Road diversion via B1122, A12, A1094 and B1069. These works are to tie in the realignment of Lovers Lane. 

  • Day time closure of the Southern end of the B1122 Leiston Road from 6 – 10 October between 09:00 – 16:00. Diversions in place B1125, B1387, A12 and B1122. 

  • Moat Road, Therberton closed from 22 September till 17 October, to enable BT Openreach to ground overhead cables diversion via Hawthorn Road and Pretty Road. 

  • B1125 Reckford Road, Westleton will be closed for UK Power Network to carry our power connections between 22 to 30 September. Diversion via B1387, A12 and B1122. The southern end of the B1125 will be closed between the hours of 09:00 - 16:00 from 6 to 10 October for vegetation clearance and tree felling. Diversion via B1387, A12 and B1122. 

  • Church Road, Theberton will be closed between 6 and 24 October by Scottish Power to carry out Sizewell C and Scottish Power combined mitigation scheme at Theberton. 

  • Kettles Lane, Benhall is closed until June 2026 for the construction of the Friday Street roundabout. 

  • B1069 Snape Road is closed on 2 further weekends (27 to 29 September and 10 to 12 October) by Scottish Power to carry out works to deliver their access.

Traffic Management 

  • A12 single lane closure northbound along the dual carriage way from Ufford Road to the Wickham Market Slip Road. Expected to be in place till 20 December 2025. 

  • A12 Marlesford in the vicinity of the Farm Café, varying traffic management, including traffic signals, in place to enable UK Power Network power connection works. Expected to be in place until November 2025. 

  • A12, Friday Street varying traffic management in place, including lane closures and traffic signals until June 2026 as part of construction of the new roundabout. 

  • B1122 off peak traffic signals implemented by Scottish Power at Theberton to deliver improved pedestrian footway 22 September to 24 October. 

  • Sizewell C is also currently implementing short term night-time traffic management associated with the delivery of the Sizewell C countywide highway signs throughout the month. 

  • Two-way traffic light during off peak hours 09:30 – 15:30 Monday to Friday on the A12 north of Town Farm Lane. This will be in place from 29 September – 10 October 2025.

Speed Restrictions

  • A12 between Glemham and Benhall, 30 mph speed limit in place whilst works are carried out to construct the new by-pass.

  • A12 Friday Street 30 mph speed limit in place whilst works are carried out to construct the new roundabout. 

  • A12 between Kelsale and Yoxford, 30 mph speed limit in place whilst works are carried out to construct the Sizewell Link Road and roundabout. 

  • A12 Darsham, 30 mph speed limit in place whilst works are carried out to construct the Northern Park & Ride roundabout. 

  • B1122, Lover’s Lane and Sizewell Gap 30 mph speed limit in place. 

  • B1125, 30mph and 50mph speed limits in place associated with speed cameras. 

  • Buckleswood Road and Westward Ho 30 mph speed limit in place whilst works are carried out to construct the Green Rail Route.

Sizewell C Consultation

The B1122/1125 Junction update. Westleton & Middleton Parish Councils submitted a letter to Sizewell C concerning the planned junction changes & connection to the Sizewell Relief Road. The result was a meeting with SZC on the 16th October 2025, with both Parish Councils & Paul Ashton from East Suffolk District Council in attendance.

The Parish Council have submitted their response to EDF's stage 5 consultation. Read Westleton Parish Council response to EDF's stage 5 consultation.

The Parish Council made representations at the online Planning Inspectorate Open Floor Hearing. Read Westleton Parish Council's oral evidence to the Planning Inspectorate Hearing. The Parish Council also sent its written evidence to the Planning Inspectorate which is also available to read.

Andrew Turner, on behalf of the Westleton Parish Council, has submitted a Transport Submission response to the planning inspectorate.

There was a  SZC Community Forum held on March 27th 2025 at Hinton. Details of the presentation are available.

 

Sizewell C - Northern Forum meeting update

Meeting notes for the Northern Forum meeting held on the 5th Novemver 2025.

Here are the meeting notes held on the 6th August 2025 for the Northern Forum.

The meeting notes from the May 7th 2025 meeting of the Northern Forum.

Here is the February 5th 2025 meeting of the Northern Forum with the meeting notes taken. A presentation was given with the latest updates plus our Parish Council Chairman took additonal notes.

The November 6th 2024 meeting of the SZC Northern Forum was attended by members of the Westleton Parish Council team. The presentation given at the meeting outlines the latest information and updates plus the meeting notes from our Parish Council chairman.

Details of the 8th of May 2024 SZC Northern Forum. Of special note is that the community helpline can be used to ask a question or report concerns including to report vehicles believed to be SCZ vehicles which are being driven badly, too fast, or which are using a road they shouldn’t be on (such as any vehicle over 3.5 tonnes on the B1125). The community helpline number is 0800 197 6102 and the email is info@sizewellc.com.

For those that wish to access the full presentation from the meeting, please click on the link.

 

National Grid consultation

LIONLINK (formerly known as Eurolink) - Updated

Further information on the proposed Lionlink has been issued as of August 2024. Please find below the newsletter that was sent to 9,000 local homes &  the notification of Ground Investigation works that are starting on the 27th August 2024.

Newsletter

Notification

Westleton Parish Council has responded to the National Grid's Lionlink proposal, dated October 2023. For more information about the LionLink plans, please visit the National Grid website.

SEALINK - Updated

November 2025. The Parish Council Chairman gave a presentation to the Planning Inspectorate (PINS) Open Hearing for the Sealink Examination. This was held on Wednesday 5th November.

July 2025 - Updated deadline to register your interest - a message from the Planning Inspectorate. 

Due to an error in publishing the applicant’s notice under regulation 9 of the Applications: Prescribed Forms and Procedures Regulations 2009, another relevant representation period will open for the Sea Link project from Friday 18 July 2025. The deadline for all relevant representations is 23:59pm Monday 18 August 2025. This relevant representation period is open to all persons who have not already made a valid representation during the previous period ending 23:59pm Monday 23 June 2025.

Relevant representations can be made using the online form which will be available on this website from Friday 18 July 2025, or by requesting a hard copy form via our project email address southeastanglialink@planninginspectorate.gov.uk or by calling 0303 444 5000. All completed registration forms must be received by the Planning Inspectorate before the close of the deadline.

May 2025 - Register to have your say. The Planning Inspectorate (PI) has invited organisations and individuals to register as interested parties to allow participation in the PI Examination of the Sea Link project. The Parish Council will register and recommends that residents also register as the additional traffic and construction works required for the Sea Link project will impact our area already suffering from the SZC works. The more individuals who register as interested parties to oppose the project, the harder it is for the Planning Inspectorate to approve it. You can find information and guidance, and subscribe to receive Planning Inspectorate updates at the Sea Link page on the National Planning Inspectorate website (project EN020026) and at this link: Sea Link - Project information

Westleton Parish Council has published a further update to the National Grid's Sealink proposals dated July 2024. Read their submission to the updated project proposals,

Westleton Parish Council published its initial response to the National Grid's Sealink proposals in December 2023.