Project Name: Woodmansterne Lane
Scheme background: SGN/NDA Mains Replacement Scheme
The SGN/NDA mains replacement scheme formed part of the wider installation works for new EV charging
points at Dobbies Garden Centre, Wallington, within the London Borough of Sutton.
The project was initiated following Sutton Council’s permit process, during which Matrix identified an
opportunity to collaborate with SGN by utilising an existing road closure. This proactive engagement enabled
the parties to streamline works and avoid duplication of disruption.
Project Timeline
Start Date: 3 March 2025
Duration: 8 weeks
Matrix Group involvement: 25 March 2025 – 17 April 2025
Scope of Works
- SGN/NDA carried out an open cut installation of 226m of 180mm PE pipe, alongside the abandonment of 209m of 6” main.
- All gas services were renewed during the programme.
- Vacuum excavation (vac ex) was deployed to safely expose service and connection holes.
- Matrix Group collaborated with SGN in the open cut trench to install cables for the new EV charging points at Dobbies Garden Centre.
Stakeholder Engagement
Regular coordination was required across multiple parties, with planned conference calls and ad-hoc meetings
to maintain project momentum. Clear communication of roles and responsibilities was essential to meeting
programme targets.
Key stakeholders included:
- Greater London Authority (GLA)
- SGN
- NDA
- Matrix Group
- Mac Civils
- Sutton Council
- Local businesses
Associated Links