Major works in Cannon Street

in your area

  • Ageing gas mains to be replaced with tough new pipes in Cannon Street
  • Work due to start April 1 and be completed in December 2019 with road closure 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 preparing to embark on a major project to replace ageing gas mains in Cannon Street in the heart of the City of London.
The essential project – designed to ensure the local area keeps on enjoying safe and reliable gas supplies– involves replacing two gas pipes in Cannon Street between the junctions with Queen Victoria Street and King William Street.
Work has been scheduled to start on Monday 1 April and the project is due to be completed in December 2019. The pipes being replaced are located deep underground and to enable the work to be carried out safely Cannon Street will need to be closed for the duration of the project.
From 8pm on Sunday 31 March 2019 signed diversions will be in place. Access for emergency vehicles, residents and businesses, including deliveries, will be maintained.  All bus stops on the closed section of Cannon Street will be suspended for the duration of the project with buses following the diversion route. Two diversions will be in place for the duration of the project. There will be a westbound diversion via Gracechurch Street, Bishopsgate, Wormwood Street, London Wall and St Martin’s-le-Grand. Eastbound traffic will be 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 will remain 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 will do 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.



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.

Cadent manages the national gas emergency service free phone line on behalf of the gas industry - 0800 111 999*

Cadent Gas Ltd is owned by a consortium of global investors.

*All calls are recorded and may be monitored.

Media contacts