Parliamentary Voting System and Constituencies Bill

The Office of Population Censuses and Surveys used to do the same job and was the guardian of data on births, marriages and deaths by geographical area. To my certain knowledge, it used that data in Birmingham to update the figures. The health authority used those OPCS figures for births, marriages and deaths. It did not track the population, but it had a base of information that could be used for an annual update. That is what I recall.