This series presents results of the 2010 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 2010 survey provides the fourth 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 second survey during the operational phase of the wind farm and results have been compared with pre-construction (baseline), during-construction and first post-construction surveys in preceding years. The 4m trawl surveys have detected no major impact from wind farm operation on the distribution of fish locally. This conclusion is based on high levels of similarity between catches pre, during and postconstruction across sites and is consistent with the project Environmental Impact Assessment which did not anticipate major effects. In general, catch rates were considerably lower in 2010 than in preceding survey years, but these reductions occurred throughout the survey area, and not solely within and around the wind farm array.