Since 2023, BP Mitchell have been operating an Asphalt Production Plant on Birchall Lane, Cole Green, despite it never having appeared in any previous Planning Applications.
 

The plant runs from early morning to late afternoon, producing a constant loud, low‑frequency hum, along with fumes and bitumen odours that affect nearby residents and the local environment.
 

On 19 December 2025, they have attempted to bolt on the Asphalt Plant by quietly amending the existing Planning Application; a clear attempt to avoid submitting a new, full application that would require neighbour notification and give residents their legal right to comment.

This is a major change to the site’s scale, appearance, operations, and environmental impact, and it directly contradicts the 300+ residents who signed the original petition calling for exactly that: a new, full, transparent planning process.
 

We again call for Hertfordshire County Council to force a proper, transparent application in which residents are genuinely able to have their voices heard.