This paper discusses the development and application of a new model of soft cliff erosion. The model is based on the premise that coastal erosion in soft cliff areas is driven by the energy delivered to the cliff foot via waves and sea-level. The model is validated against historical records along the south west Isle of Wight coastline and the Suffolk coasts. The model is then forced with downscaled projections of future climate under different emissions scenarios. Results suggest that marked increases in rates of cliff retreat along both the Isle of Wight and Suffolk coastlines are likely to be experienced by 2100.