Dr Anna Stec is a lecturer in Fire Chemistry and Toxicology in the Centre for Fire and Hazard Science at University of Central Lancashire, UK. Her work has focused on quantification of toxic hazards in fires, understanding the factors that affect fire gas toxicity, and the relationship between the physiological effects of the concentration and dose of different toxicants. She has conducted detailed comparisons on the yields of fire gases and other combustion products using a selection of different small-scale fire models in order to predict the effects of fire exposures to humans. Dr Stec has been designated as the UK’s Principal Expert on fire chemistry, and an active participant at the ISO TC 92 Fire threat to people and environment meetings. Professor Richard Hull is a Professor of Chemistry and Fire Science in the Centre for Fire and Hazard Science at University of Central Lancashire, UK.. His work has focused on fire retardant mechanisms, fire effluent toxicity and fire science. With another contributor, Prof David Purser, he has been pivotal in the development of the steady state tube furnace as the first internationally recognised standard for the assessment of fire gas toxicity (ISO TS 19700); as one of the only methods capable of replicating real fire conditions on a bench-scale, this has led to its growing acceptance, particularly for performance-based fire assessment.