The Forestry Commission has ordered poultry producer Bernard Matthews to replant more than 300 trees felled at one of its farms.
The company cut down 342 mature trees at Oulton, near Aylsham, Norfolk, on a site where it hopes to erect a 262ft (80m) wind turbine.
The Forestry Commission was called in to investigate and said the trees had been cut down without a licence. It will order the re-planting.
Bernard Matthews Farms told the BBC it had yet to hear from the Forestry Commission. The company planted the trees as part of conditions imposed when planning permission for turkey sheds was granted in 1991, but felled them last month.
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