The UK, although it is an area of low seismicity, has suffered occasional earthquakes over the centuries. To date, structural design in the UK has only acknowledged earthquake loading for nuclear plants and other similar facilities. However, the issue of earthquake design criteria for conventional structures has arisen because of the proposal for a standard European seismic code of building practice. Therefore the Department of the Environment commissioned this study from Ove Arup and Partners to develop an appreciation of seismic risk to the UK insofar as it affects the built environment, and to determine whether seismicity should be taken into account in future planning decisions, and, if so, how. This is their summary report. The Director of the International Seismological Laboratory has commended this work as a model to be followed overseas. The full technical report is available from Ove Arup and Partners (approx #250.00).