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Professors John Salt, of University College, London, and Phil Rees, of the University of Leeds, "Current and future migration trends in the UK are examined in this booklet which describes, among other things, how numbers of foreign nationals working in the UK rose strongly to top a million for the first time in 1998, and by 2005 had reached 1.5 million (4.1 per cent of all in employment). Includes statistics and analyses produced by the Office for National Statistics (ONS)."