Kings Gate & Zig Zag building, Westminster

Lend Lease/Land Securities


Our initial appointment related to dispersion modelling of emissions from proposed combustion plant at this iconic development in Central London in order to determine an appropriate stack discharge height.

With flues from both the Zig Zag and the Kings Gate buildings discharging at high level, the key consideration on this particular development was in relation to roof level amenity space on the Kings Gate residential building.

Detailed dispersion modelling was undertaken using ADMS 5 to predict concentrations at existing and proposed sensitive receptors. Our report was approved by the Local Authority who asked our client to convey their appreciation to us for the thoroughness of our report.

A subsequent issue arose with odour from a kitchen extract vent, also discharging at roof level. The discharge was located in close proximity to the roof terraces and was impacting upon sales of the penthouse apartments.

We commissioned an olfactometry survey to determine the odour concentration at the discharge point and used ADMS 5 to predict dispersion of odour at roof level under different scenarios to inform a plan of remedial action.

  • Detailed dispersion modelling using ADMS 5
  • Stack height assessment
  • Odour impact assessment
  • Liaison with M&E designer
  • Regulator liaison
St Christophers