Coming soon: Motorists reminded about upcoming lane closures affecting A12 on the Essex/Suffolk border

in your area

▪       Near side lane, slip road and layby closures planned along the northbound side of the A12 between junction 29a and junction 30 near the Essex/Suffolk border

▪       Diversion route will be in place for the duration of the project which starts at the beginning of April 2017

▪       Project will help ensure safe and reliable gas supplies for cooking and heating are maintained


Motorists are being reminded that major work will soon be starting which will affect a section of one of East Anglia’s major routes, the A12.


Early next month (April 2017) engineers will begin essential investigation and remediation work on a section of gas pipeline. This important work will help ensure the region keeps on enjoying safe and reliable gas supplies for cooking and heating.


The gas pipeline where the engineers will be working is located close to the slip road and due to the high speed of traffic leaving the A12 the following closures must be implemented so work can be carried out safely and efficiently.


  • Closure of a 900m stretch of the nearside lane of the A12 northbound at junction 29a between 9pm and 5am overnight between Sunday 2 April and Monday 3 April 2017 and 9pm on Friday 16 June and 5am on Saturday 17 June 2017.
  • Closure of the laybys immediately before and after junction 29a during the above dates and times
  • Closure of the slip road off the northbound A12 at junction 29a between 5am on Monday 3 April and 5am on Friday 16 June 2017


The following diversion will be in place for the duration of the project:

Traffic leave A12 at junction 30 (Stratford St Mary) and follow diversion via Upper Street, The Street, Lower Street and Gun Hill.

Karl Shipp, Network Supervisor Gas Pipelines, East Anglia, National Grid Gas Distribution, said: “After months of planning we’ll soon be starting our work on site.

“To ensure our engineers can work safely we need to close the slip road. To set up and then remove the slip road closure we also need to implement two overnight closures of the nearside northbound carriageway.”

He added: “This project has been planned in close discussion with the local authorities and we’re doing all we can to minimise any disruption to the public, such as carrying out the A12 closures at quiet overnight periods.

“Our essential work will help ensure local people keep on enjoying safe and reliable gas supplies for cooking and heating.”

For more information on the work people can call 0845 835 1111 or email

To find out more about National Grid‘s gas mains work go to

Suspected gas escapes should be reported on 0800 111 999.

This press release relates to Cadent work.  It does not have Cadent branding on it, due to this press release being published prior to 1st May 2017, when this gas distribution business was part of National Grid’s group of businesses.


Cadent is the UK’s largest gas distribution network with a 200-year legacy.  We are in a unique position to build on strong foundations whilst encouraging the curiosity to think differently and the courage to embrace change.  Day to day we continue to operate, maintain and innovate the UK’s largest gas network, transporting gas safely and protecting people in an emergency.   Our skilled engineers and specialists remain committed to the communities we serve, working day and night to ensure gas reaches 11 million homes from Cumbria to North London and the Welsh Borders to East Anglia, to keep your energy flowing. 

Future of Gas: Here at Cadent we support the Government’s plans to reach Net Zero by 2050. That means we’re backing the introduction of hydrogen as a low carbon alternative to natural gas for the future. We know people love the controllability of gas and, with our network already in place, it makes sense to switch to the lower carbon alternative offered by hydrogen, which we believe can keep homes and businesses warm for generations to come.

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Media contacts

Ben Green

07773 122925