PPS 15: Planning and Flood Risk
FLD 1: Assessing Flood Risk
8.21 An assessment of flood risk will be expected to accompany all development proposals in flood plains. This assessment may be of a relatively minor nature where the development proposed is small with minimal secondary effects or may entail a major study covering catchment wide issues, for example where a major infrastructure project is envisaged. Further information on this matter is set out in Annex D.