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

Lane, layby and slip road closures coming to A12 soon

15 Mar 2017


▪       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.


Contact for media information only

Regional press officer - North London & East Anglia networks
Antony Quarrell
+44 (0)7810 853075
+44 (0)7810 853075

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Notes for editors

Notes to Editors:

National Grid is one of the largest investor-owned energy companies in the world and was named Responsible Business of the Year 2014 by Business in the Community. This accolade acknowledges all of our efforts in getting involve with the things that really matter to us and to society. We own and manage the grids that connect people to the energy they need, from whatever the source.  In Britain and the north-eastern states of the US we run systems that deliver gas and electricity to millions of people, businesses and communities.

In Britain, we run the gas and electricity systems that our society is built on, delivering gas and electricity across the country.  In the North Eastern US, we connect more than seven million gas and electric customers to vital energy sources, essential for our modern lifestyles.

National Grid in the UK:

  • We own the high-voltage electricity transmission network in England and Wales, operating it across Great Britain
  • We own and operate the high pressure gas transmission system in Britain
  • We also own a number of related businesses including LNG importation, land remediation and metering
  • Our portfolio of other businesses is mainly concerned with infrastructure provision and related services where we can exploit our core skills and assets to create value. These businesses operate in areas such as Metering, Grain LNG Import, Interconnectors and Property. National Grid Carbon Ltd is a wholly owned subsidiary of National Grid. It undertakes Carbon Capture Storage related activities on behalf of National Grid.

Find out more about the energy challenge and how National Grid is helping find solutions to some of the challenges we face at

National Grid undertakes no obligation to update any of the information contained in this release, which speaks only as at the date of this release, unless required by law or regulation.

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