The number of migrants seeking work in the UK rose by 27% in the space of a year, new figures from the Office for National Statistics (ONS) show.
201,000 people came to the country for employment in 2013, up from 180,000 the previous year.
Of those, 125,000 were from the EU, compared to 95,000 the previous year.
Work remains the most common reason for immigration to the UK, the ONS said.
More top news
After a wintry end to last week, a fast track to summer
The Tooting MP has been the frontrunner in the counting process ahead of Tory challenger Zac Goldsmith.
North Korea's leader hailed the testing of a H bomb as his greatest achievement in office during the first congress in 36 years.