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Foreign Workers: Enfield

Volume 474: debated on Tuesday 1 April 2008

To ask the Chancellor of the Exchequer what his most recent estimate is of the number of migrant workers in Enfield North constituency in each of the last 10 years. (196799)

The information requested falls within the responsibility of the National Statistician, who has been asked to reply.

Letter from Jil Matheson dated 31 March 2008:

The National Statistician has been asked to reply to your Parliamentary Question on what the most recent estimate is of the number of migrant workers in Enfield, North in each of the last ten years. I am replying in her absence. (196799)

The Office for National Statistics compiles statistics on migrant workers for local areas from the Annual Population survey (APS) and its predecessor the annual Labour Force Survey (LFS). The National Statistics method for estimating the number of migrant workers employed in the UK is routinely based on the number of people at a given time who were born abroad, are of working age (16-64 for men, 16-59 for women), and in employment. This question has been answered on this basis. It means, for example, that some people who are UK nationals will be included in the total of “foreign born” and that people who are working but are above state pension age are not included.

The table attached shows the numbers of people of working age in employment who were not born in the UK and were resident in Enfield, North Parliamentary Constituency. Estimates are obtained from the annual LFS for each 12 months period ending in February from 1998 to 2004. For time series comparisons, the APS estimates from 2005 to 2007 are provided covering the 12 month periods ending in March, but the most recently released estimate is also included, which covers the 12 month period ending in September 2007.

When interpreting these figures, it is important to bear in mind that the APS is not designed to cover everyone who is present in the UK. The survey may undercount the numbers of people who were born overseas. The reasons are set out in the table footnote.

As these estimates are for a subset of the population in small geographical areas they are based on small sample sizes, and are therefore subject to large margins of uncertainty.

In order to produce estimates for small geographical areas, APS and annual LFS estimates are provided based on survey microdata. These are consistent with the UK population estimates published in February and March 2003, whereas the regional and national estimates published in the Labour Market Statistics First Release are based on more up-to-date population figures, so the two are not directly comparable.

Number of migrant workers1 in employment resident in Enfield, North constituency in the last ten years


12 months ending

Migrant workers1

February 1998


February 1999


February 2000


February 2001


February 2002


February 2003


February 2004


March 2005


March 2006


March 2007


September 2007


1 Includes males aged 16-64 and females aged 16-59 born outside the UK. Does not include respondents who did not answer the question on country of birth.

2 Data on migrant workers not available for this period

As with any sample survey, estimates from the APS are subject to margin of uncertainty.

It should also be noted that the country of birth question in the APS may undercount the numbers of people who were born overseas

It excludes certain people who have been resident in the UK for less than six months.

It excludes students in halls who do not have a UK resident parent.

It excludes people in most other types of communal establishments (eg hotels, boarding houses, hostels, mobile home sites, etc.)

It is grossed to population estimates which exclude migrants staying for less than 12 months.


Annual Labour Force Survey/Annual Population Survey