Complex sentence: Previous reports on tidal power in the Severn did not--and did not aim to--provide a detailed analysis of all tidal range technologies, the feasibility study aims to considers all tidal range technologies, including barrages and lagoons.
Split into simpler sentences: Previous reports on tidal power in the Severn did not--and did not aim to--provide a detailed analysis of all tidal range technologies. This feasibility study aims to consider all tidal range technologies, including barrages and lagoons.