Migration Watch UK published on 26 July a summary guide (Briefing Paper No 1.29) to the latest research. It covers:
Gross Domestic Product (GDP) per head
Employment
Wages
Budgetary impact
And includes useful quotes (and urls) from:
The House of Lords
Migration Advisory Committee (MAC)
National Institute of Economic and Social Research (NIESR)
Office for National Statistics (ONS)
Department for Communities and Local Government (DCLG)
It is intended as a useful reference document for those with a serious interest in the subject.