Firebrands are a leading cause of ignitionat the wildland urban interface and a driver of rapid fire spread during wildfires. Current studies which seek to evaluate this risk are limited by a paucity of data relating to the firebrand dynamics from real fires. In particular the deposition of firebrands as a function of time and space relative to the fireline and the propensity for firebrands to result in ignition of structural materials. This project sought to join these areas by accurately measuring the firebrand deposition from head firesand relatingthis to the fire behaviour.The primary objectives were to measure the fire behaviour, and firebrand deposition. This was complimented by an assessment of the risk posed by firebrands in structure ignitions and an implementation of firebrand generation and transport in a numerical model (Fire Dynamics Simulator). Novel data collection techniques were developed to satisfy these objectives. Firebehaviour (spread and intensity) was measured using a network of bespoke, GPS enabled temperature loggers (FireTrackers) complimented by a lower density array of flame height measurements. Local wind velocity was also measured. Firebrand measurements were primarily made by collection in cans distributed downwind of the fire. Addition of video recording at the collection sites allowed the time dependence to be evaluated such that firebrand deposition dynamics could be linked to fire behaviours. The key findings of the project are that: firebrand deposition dynamics arelinearly proportional to increases in fire behaviour; firebrand deposition occurred up to 200 m from the fire line(for the fires and conditions studied); ignition of materials is dependent on the smouldering characteristics of firebrand accumulations.Themethodology as presented can be adopted during other prescribed or management fires to add to the data set and generate a set of consistent knowledge within the community. The data collected can be used when planningand evaluating the riskposed by management in similar systems and environmentalconditions to those studied here. The data are also useful for development of methods aimed at reducingthe firebrand ignition risk at the WUIand in ensuring the design of future experimental investigationsis relatable to realistic conditions.