Key concerns

The proposed site covers approximately 45,000 acres of countryside described as largely grade 2 under the Agricultural Land Classification — land that falls within the 'best and most versatile' category protected by the National Planning Policy Framework.

The Environment Agency classifies East Anglia as an area of serious water stress. Cambridge Water's resource management plan describes significant supply constraints, including large reductions in chalk aquifer abstraction. No water supply solution for a city of this scale has been publicly evidenced.

The proposal claims delivery of schools, hospitals, and transport 'from the start,' but no infrastructure delivery plan, funding model, or phasing strategy has been published.

The proposed footprint encompasses established villages including Cowlinge, Great Thurlow, and Withersfield. The developer's governance model would require development corporation powers that could override local planning authority decisions.

The developer claims homes at '60% below market rates' via a combined SEZ and CLT model. No independent economic assessment of this cross-subsidy mechanism has been published. Resale restrictions, mortgage availability, and downturn resilience remain open questions.

The proposal depends on Parliament granting development corporation powers, including compulsory purchase authority. This would transfer planning and land acquisition decisions away from elected local councils to an appointed body.