
Major planned projects in and around Portsmouth
Updated Thursday 24 July
From Monday 28 July, we'll need to urgently repair our gas network in Medina Road, Cosham.
For everyone's safety, we'll need to temporarily close Medina Road at its crossroads with Cow Lane and Old Wymering Lane. A signed diversion route will be in place for road users.
We expect our work to take approximately six weeks.
Bus routes will be affected - passengers are advised to check with your local service provider.
We're sorry for any inconvenience our urgent repairs may cause.
Updated Thursday 24 July
Our engineers are carrying out gas main replacement on a section of Winter Road in Southsea. This replacement work is being carried out urgently, to provide a permanent solution instead of a long-term repair.
Due to the condition of the main, we have had to extend this project, investing in our network. While we understand there is disruption right now, this is one of the last sections of metallic pipe in this area, meaning it will be less disruptive in the future once replaced.
We are planning to have the project completed within the next four weeks.
Due to the location of the gas main in the road, it has been necessary to temporarily close Winter Road from just south of Oliver Road to the junction of Highland Road.
This closure will mean:
- No through vehicle traffic past the closure in either direction in Winter Road.
- Vehicle access to Winter Road north of the closure will be via a signed diversion route from the Devonshire Avenue end of the road.
- Vehicle access to properties within the closure will be maintained – local arrangements will be in place and the team on site will keep residents informed.
Current planned projects
Baffins area
Start: 30 June 2025
Duration: 13 months
Our specialist contractors are working to replace the gas main in Stride Avenue and surrounding roads.
St Mary's Road
Start: 30 July 2025
Duration: Five weeks
Our specialist contractors are working to replace the gas network in the St Mary's Road area.

Roadworks in your area
It could be emergency work to keep you, and our network, safe. As this type of work is urgent and unplanned, we sometimes start work before it appears on the map.
We're sorry for disturbing you. In an emergency, we need to make the situation safe immediately and sometimes it can't wait until the morning. Watch our short film to find out more about why we have to work at night:
The engineering required for our project would not safely allow night-time work on a live gas supply. The infrastructure under the road is close to other critical utilities such as electricity, water, BT and broadband and we need to avoid these pipes and wires while working in the road.
There are many reasons why engineers may not be visible on site:
- To maintain gas supplies while replacing this gas main there are jobs that require the engineers to leave site
- They could be testing pressures on local governors around the area, collecting materials from local storage, carrying out mandatory health and safety paperwork in their van, or need network access
- The road may be being reinstated and they are waiting for the concrete to cure.
We’ll aim to put signs out to keep you informed.
Search for your road in our local gas works map to find out more about our work. You’ll need to change the date in the search bar so you can see our future work. Click on the gas flame icon that appears on your road to see details of what we’ll be doing in your road and when.
We will make sure emergency services are fully aware of the road closure and the planned diversion route. They will make sure their response teams are allocated from the quickest route. We will make sure vehicle access to properties located within the lane closure is maintained and will keep emergency services advised.
We look after the gas pipes in the south of England and across Scotland.
If you're not sure who manages the network of pipes that delivers your gas, use our postcode checker to find out if we deliver gas to your area
If we're not your supplier, the FindMySupplier website is able to let you know your gas transporter, your energy supplier and your MPRN.
The dates shown on the map are taken from the works permit we are granted which doesn’t always match the duration of the works required.
For example, the permit may be for one week but the work will only take three days to complete. This allows for flexibility and unforeseen circumstances.
There are many reasons why roadwork dates may be change and sometimes these are things that are outside of our control.
We appreciate it is frustrating when this happens and we will do what we can to minimise impact on you.
Our barriers must stay in place until it’s completely safe for us to remove them. Sometimes we’ll have barriers up, but our engineers won’t be there. This could be because we’re working on another section of the project, or we could have finished work and we’re waiting for the new road surface to set.