http://en.wikipedia.org/wiki/Central_Statistical_Office,_UK

Demographic services is perfectly acceptable (as my link) shows to describe part of the of the UK National Office of Statistics which replaced the now obsolete Central Statistics Office some years ago.

The ONS was formed on 1 April 1996 by the merger of the Central Statistical Office (CSO) and the Office of Population Censuses and Surveys (OPCS).

The Office for National Statistics (ONS) is the United Kingdom government department charged with the collection and publication of statistics related to the economy, population and society of the United Kingdom at national and local levels. For historical reasons, it incorporates the General Register Office so is also responsible for the registration of births, deaths and marriages in England and Wales.
http://en.wikipedia.org/wiki/Office_for_National_Statistics

The Office for National Statistics - 04:27
Free access to data produced by the Office for National Statistics, government departments and ... UK Electoral statistics - 2007. -. 28 February 2008 ...
www.statistics.gov.uk/

Another option.

My suggestion

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Note added at 7 ore (2008-03-03 19:41:40 GMT)
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