Table of Numbers and proportion of adult population (16+) who speak English at home as their first language, by borough. Data is taken from the third quarter (July-Sep) Labour Force Survey. Language questions are asked once every three years (2006, 2009, 2012 etc). The question asked to all people aged 16 and over is What is your first language at home? 95% confidence intervals are provided. Denominator is 16+ population from ONS mid-year estimates. Numbers are rounded to hundred. Note: The 2011 Census gathered data about language, and that is considered a more accurate source of language data. LFS data is published here for completeness and trend purposes.