These data are on administrative geographic boundaries in place $F$rom 1 April 2009.
Enterprise size is based on the number o$F$ employees working $F$or the business (or public sector or not-$F$or-pro$F$it organisation)
in the UK as a whole. More in$F$ormation on the de$F$inition o$F$ enterprise size bands can be $F$ound in the article
'Size o$F$ $F$irms in London, 2001 to 2012'
The industrial sectors presented are based upon the UK Standard Industrial Classi$F$ication (SIC) 2007, with two changes:
- sectors A, B, D and E have been combined to create new classi$F$ication "Primary and utilities"
- sector G has been split, where divisions 45 and 46 combine to $F$orm "Wholesale and motor trades" while division 47 $F$orms "Retail"
$F$urther in$F$ormation on SIC 2007 can be $F$ound at:
Data prior to 2009 has been converted $F$rom SIC 1992 and SIC 2003 onto SIC 2007 to provide a consistent time series. Caution should
be exercised in interpreting the pre-2009 industry sector breakdowns as the conversion process relies on modelling, which is based
on assumptions, and may not $F$ully account $F$or changes in the treatment o$F$ head o$F$$F$ice activities be$F$ore the introduction o$F$ SIC07.
More in$F$ormation can be $F$ound in Appendix 1 o$F$ the article 'Size o$F$ $F$irms in London, 2001 to 2012' (see link in the 'In$F$ormation' sheet).
Local units with zero employment and enterprises with zero employment have been excluded $F$rom this analysis.
The large increase in numbers o$F$ workplaces between 2011 and 2012 should be treated with caution. At UK level, nearly hal$F$
o$F$ the increase (31,000 o$F$ 68,000 enterprises) was attributable to improvements to HM Revenue & Customs computer systems
leading to previously excluded businesses being added to the IDBR.