Road closure in Cannon Street: Engineers work through summer heat to help keep City of London warm until dawn of 22nd century

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  • Work continues to replace ageing gas mains to be replaced with tough new pipes in Cannon Street
  • Work on schedule to be completed in  December 2019 with road closure  continuing in Cannon Street for duration of project
  • New pipes will last over 80 years helping keep Londoners connected to safe and reliable gas supplies until the dawn of the 22nd century  
Cadent is working through the summer heat on a major project in the heart of the City of London that will help keep people warm in future winters.
Work to replace ageing gas mains in Cannon Street began in April 2019 and is continuing through the summer holidays with the project scheduled to finish this December.
The essential project – designed to ensure the local area keeps on enjoying safe and reliable gas supplies for cooking and heating– involves replacing two gas pipes in Cannon Street between the junctions with Queen Victoria Street and King William Street.
The pipes being replaced are located deep underground and to enable the work to be carried out safely Cannon Street has had to be closed for the duration of the project.
Access for emergency vehicles, residents and businesses, including deliveries, is being maintained.  All bus stops on the closed section of Cannon Street have been suspended for the duration of the project with buses following the diversion route. Two diversions are place for the duration of the project. There is a westbound diversion via Gracechurch Street, Bishopsgate, Wormwood Street, London Wall and St Martin’s-le-Grand. Eastbound traffic is being diverted via Bank Junction which will be partially reopened eastbound from Queen Victoria Street to Threadneedle Street and King William Street only, all other traffic restrictions at Bank will remain in place.
Local shops and businesses are open as usual throughout the project with access maintained for pedestrians.
Cadent Authorising Engineer Michael Morris said: “This work will help ensure the City of London continues to enjoy a first rate gas network for many decades to come. Safe and reliable gas supplies for cooking and heating will be maintained in the area and the number of disruptive unplanned repair jobs required on ageing gas mains will be cut.”
Work has been planned in close discussion with the City of London.
Cadent is doing all it can to deliver the work with as little disruption as possible.
If anyone has any questions about the work they can contact the project’s Community Relations Team on 0800 389 8261 or email for more information. For 24-hour operational enquiries people should call 0800 096 5678.
This work is part of Cadent’s ongoing investment across its network to replace and upgrade old gas mains with safer and more durable modern pipes.
Gas Mains Replacement - Cannon Street Map 



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. 

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