Launched in October 2011 this project involved Black & Veatch, in collaboration with HR Wallingford and the University of Edinburgh to develop a model of the UK Continental Shelf and North European Waters, 100 times more accurate than existing marine data. This has been used to assess the tidal energy potential around the UK (tidal range and tidal streams), to informThe design of energy harnessing schemes, to assess their interactions, and to evaluate their impact on European coasts. It can also be used to renew and inform flood defences, coastal erosion and aggregate extraction. Now completed,The project has been launched to market under the brand of SMARTtide. This is available to the marine industry under licence from HR Wallingford.This deliverable is number 4 of 10 in the Tidal Modelling project and consists of a parametric Cost of Energy Model for tidal barrage and lagoon technologies.The deliverable consists of three elements;an Excel model with parametric representations of cost drivers such as size and arrangements of civils works, turbine choices, O&M choices etc;a model report describing the model, assumptions and case study examples, anda user guide.he model can be used in isolation, or with inputs provided manually from the Continental Shelf Models developed elsewhere in the project.This document is (b),The model report. The Excel model and user guide are no longer available.