Complex sentence: Following the necessary Act of Parliament in 1860, the Metropolitan police took over policing of Portsmouth and Devonport Dockyards and the smaller establishments in the same vicinities and the remaining Naval Establishments were quickly taken over.
Split into simpler sentences: Following the necessary Act of Parliament in 1860, the Metropolitan Police took over policing of Portsmouth and Devonport Dockyards. The smaller establishments in the same vicinities and the remaining Naval Establishments were quickly taken over.