The Census of Employment, conducted by the census, provides an accurate picture of the level and distribution of employment. The ONS also provides the benchmark for the employment estimates based on the smaller monthly and quarterly surveys (Short-Term Surveys).
With effect from September 1995, the Census of Employment has been replaced by the Annual Employment Survey (AES). This is a much smaller annual survey covering approximately 130,000 businesses.This has now Ceased .
Data are collected on the number of jobs by local area, detailed industrial activity, sex and whether full or part-time.
The Census of Employment covers Great Britain. The Department of Economic Development (Northern Ireland) runs a full Census of Employment and together these data provide United Kingdom figure...

More Source information to be found here ...