When is the main under my street due for replacement?
Cadent replaced 1,621 km of gas mains and SGN 1,054 km in 2025/26, and both publish pipe data on open portals.
No single register of heat networks exists until Ofgem publishes its list.
£5m fine
After a fatal 2019 explosion in Mirfield. The leaking iron main was not on the network's drawings. HSE, Feb 2022
3,000 vs 14,000
Heat network sites on the Energy Ombudsman's list, against an industry estimate of over 14,000. Energy Ombudsman, 2026
2013 to 2023
Failures per km of remaining iron main rose slightly, and HSE found weaknesses in condition monitoring. HSE research
What Savitram does in gas and heat.
- See
Join escape reports and leak surveys to show iron main failure hotspots, as HSE's policy asks.
- Know
One record per heat network from the DESNZ database, Scottish locations and Ofgem lists.
- Comply
Draft heat network registration, due 26 January 2027, and RIIO-3 and HSE evidence from your records.
- Plan
Match heat planning data to council zoning areas, and track mains replacement spend against GD3 allowances.
The data behind every gas and heat record.
Public registers, read on each publisher's own schedule, joined with your data and Savitram's data.
- Heat Networks Planning DatabaseDESNZ · Quarterly
- Open data portal: pipes and assetsCadent
- Open data sharing portalSGN
- Gas data portalNational Gas · Daily and within the day
- List of gas licenseesOfgem · Every one to two months
- Heat network locations, ScotlandScottish Government
What is coming up.
- 31 Oct 2026CMA final determination on the GD3 appeals.
- 2 Nov 2026Ofgem's consultation on heat network authorisation closes.
- 26 Jan 2027Heat network registration deadline with Ofgem.
Who uses it.
Heads of asset management. Regulatory reporting leads. Network integrity engineers. Housing association energy managers. Council heat zoning leads.
We build and run AI systems on your survey and escape records, and train your teams to monitor every iron pipe as HSE requires.