民政事務總署
After the riot, Trench recognised the necessity to implement further reform of the government. So, with the assistance from Holmes, the government began a City District Officer Scheme in May 1968 which was based on the existing District Officer system in the New Territories. Under the new scheme, Hong Kong Island and Kowloon were divided into 10 different districts. Each district had a District Office where the District Officer concerned could collect public opinions, receive complaints and provide advice and quick responses. This scheme effectively drew the relationship between the government and the general public closer than it used to be, as the general public could easily express their needs and demands to the District Officer nearby. Alongside the reform, the Secretariat for Chinese Affairs was reorganised into the Home Affairs Department in February 1969 while the post of the Secretary for Chinese Affairs was renamed into the Secretary for Home Affairs. Holmes continued to serve after the reorganisation and was made a Companion of the Order of St Michael and St George (CMG) in the same year. Before retiring from the Home Affairs Department, he had been focusing on the legislation on abolishing polygyny. Yet, such legislation was completed in October 1971, five months after his retirement from the civil service.