UK Greens demand publication of full ecosystem-collapse security assessment

A renewed disclosure challenge

Green Party leader Zack Polanski is calling on Prime Minister Andy Burnham's government to publish the full version of Britain's national-security assessment on global ecosystem collapse. The Guardian reported on September 9 that Polanski planned to make the demand at a nature summit in Bristol, arguing that the public should see the material withheld from the 14-page version released earlier in 2026. The development is a political transparency challenge, not a new scientific finding.

The dispute matters because the public assessment is unusually direct about the security consequences of ecological degradation. It says global ecosystem decline threatens British security and prosperity and could contribute to water and food insecurity, economic disruption, migration, political instability and conflict. It identifies the Amazon and Congo rainforests, Asian coral reefs and mangroves, the Himalayas, and boreal forests in Russia and Canada as systems with particular significance for the United Kingdom.

What the official assessment establishes

The government's accessible version describes a reasonable worst-case assessment drawing on scientific research and expert judgment. It assigns confidence levels to its conclusions and repeatedly distinguishes likely consequences from uncertain timing. It judges that every critical ecosystem it examined is on a pathway toward collapse if present trends continue, while acknowledging low or moderate confidence in when particular tipping points may be crossed.

Food security is central to the assessment. Britain imports food and fertilizer and cannot produce enough food for its current population under present diets, leaving it exposed if ecosystem damage triggers international competition for supplies. The document also warns that degradation can reduce crop yields, arable land, fisheries, water regulation and climate stability. Those are the published government's findings; claims about additional material in the unredacted report remain attributable to The Guardian's reporting.

Pressure on the government's response

The Guardian also reported that environmental organizations had written to Burnham warning that national security, public health and economic growth were at risk without faster nature restoration. The groups connected overseas ecosystem threats with domestic exposure to flooding, drought, wildfire and pollution. A government spokesperson pointed to a climate-and-nature security task force, nature-recovery spending and farming support as evidence that ministers were acting.

The immediate question is whether ministers will release more of the assessment, explain the grounds for continued redactions or reject Polanski's request. A fuller disclosure could improve public scrutiny but may also contain intelligence judgments the government considers sensitive. Separately, Parliament and civil society will be able to test whether current resilience and restoration programmes match the severity of the published analysis. Until the government responds, the verified development is the formal political demand for disclosure, not a decision to publish.