Douglas has worked in the public and private sectors, offering advice on historic buildings to a range of organisations, such as English Heritage. He publishes and lectures regularly on building conservation and has contributed to various radio and television programmes. He also serves on many committees for organisations devoted to the historic built environment. In 2013, he became Chairman of the Hundred Parishes Society. Douglas is leading the conservation of the Old Sun Inn.
Douglas has worked in the public and private sectors, offering advice on historic buildings to a range of organisations, such as English Heritage. He publishes and lectures regularly on building conservation and has contributed to various radio and television programmes. He also serves on many committees for organisations devoted to the historic built environment. In 2013, he became Chairman of the Hundred Parishes Society. Douglas is leading the conservation of the Old Sun Inn.