This paper is the first output resulting from the IESD broadening out into the area of large-eddy simulation (LES) to study flows around buildings and the impact of wind on natural ventilation. Future work will capitalise on the SRIF-funded Linux cluster. Abdalla undertook the simulations and co-wrote the paper with Cook his line-manager. Yang, Loughborough University, was responsible for the original LES code used in the work.