It is somewhat inevitable that, with the construction of new developments, the wind microclimate in the vicinity of the site(s) will be altered. Where new Buildings&Constructions are significantly different in size, form, orientation or height from those in the immediate vicinity, winds can be introduced which may cause discomfort to pedestrians. This project simulates the large scale ventilation and wind micro- climate around the Queen Elizabeth Olympic Park and its legacy master plan which includes numerous Buildings&Constructions and developments across a large area. The computational model in this project represents one of the most complicated configurations ever attempted by computer simulations. The Team successfully simulated this masterplan and provided important input into the urban design in this large part of London in order to minimise environmental impact and pedestrian discomfort.