The report in this series presents results of the 2008 4m beam trawl (‘commercial fish survey’) at Burbo Bank Offshore Wind Farm. The survey contributes to a programme of environmental monitoring at the site designed in response to conditions of the Food and Environment Protection Act (FEPA) Licence issued to the developer. The 2008 survey provides the third set of annual 4m beam trawl survey data designed to sample demersal fish present in and around the wind farm and at reference sites. This was the first survey during the operational phase of the wind farm and results have been compared with pre-construction (baseline) and during-construction surveys in preceding years. The 4m trawl surveys have detected no major impact of wind farm construction and initial period of operation on the distribution of fish locally. This is concluded based on high levels of similarity between catches pre, during and post-construction across sites and is consistent with the project Environmental Impact Assessment which did not anticipate major effects.