26th August 2025

Residents and campaigners are raising serious concerns after a previous geological survey revealed dangerously high levels of methane gas at the Lisburne Lane/Blackstone Road Playing Field, a site earmarked for new housing development.

The study, conducted by the Greater Manchester Geological Unit between June and September 2004, involved gas monitoring across 15 boreholes. Results have highlighted alarmingly high concentrations of methane at several points. In particular, boreholes BH3, BH6, BH7, BH8, and BH10 showed consistently elevated methane readings, with maximum values well above the 5% Lower Explosive Limit (LEL).

According to the report, methane concentrations reached as high as 62.2% at BH1 and 56.5% at BH2, while averages of more than 40% were recorded in multiple boreholes. These levels are far beyond recognised safety thresholds and represent a potential explosion hazard if trapped within confined spaces such as basements or foundations.

Carbon dioxide levels were also found to be elevated at several boreholes, adding to the overall environmental and safety concerns about the site.

Expert Warning

The report makes clear that concentrations of methane above the 5% LEL “do represent a hazard.” With readings across the site far exceeding this level, environmental campaigners argue that the land is unsafe for residential development without extensive and costly remediation.

“This is not a minor issue,” said one local campaigner. “We are talking about gas levels that could pose real risks to future residents if this development goes ahead without the proper safeguards. The safety of families must come first.”

Impact on Development Plans

Developers hoping to push forward with new housing should now face significant questions over whether the site can be made safe. Mitigation measures such as gas membranes, venting systems, and long-term monitoring may be required, but residents say they remain unconvinced that building on this land is appropriate.

The findings are expected to intensify local opposition, with calls for Stockport Council to reconsider the suitability of these fields for housing altogether.

As one resident put it: “Turning it into a housing estate built on dangerous levels of methane is reckless. The council must listen.”