The Health and Safety Executive (HSE) commissioned a module of questions in the winter 2004/05 Labour Force Survey (LFS), to gain a view of work-related illness based on individuals' perceptions. The LFS is a household survey, and is intended to be representative of the UK population. This is the sixth survey of self-reported work-related illness undertaken in conjunction with the UK LFS. The Health and Safety Executive (HSE) commissioned a survey in 1990 covering England and Wales, and one in 1995 covering Great Britain. The European Union Statistical Office (EUROSTAT) commissioned the third in 1998/99. This included most member states, but the UK coverage was restricted to people working in the past 12 months rather than people ever employed (as in the previous two surveys). The HSE commissioned further surveys in 2001/02 and 2003/04 covering people ever employed in Great Britain. The surveys are known as SWI90, SWI95, SWI98/99, SWI01/02 and SWI03/04 (surveys of Self-reported Work-related Illness). Results were published in 1993, 1998, 2001, 2003 and 2005.