The Labour leader, Ed Miliband is to speak out in defence of immigration - but he will also say that too little has been done to integrate people who have settled here into British society.
In a speech in south London, Mr Miliband will acknowledge that some aspects of the last Labour government's policies on letting people come to Britain were, in his view, mistaken.
He will argue that society should expect a good standard of spoken English from anyone whose job requires them to understand and communicate with members of the public.
Speaking on the Today programme the Shadow Justice Secretary, Sadiq Khan, told presenter James Naughtie that the leader of the opposition will be celebrating the diversity of multi-ethnic Britain in his speech but added that this should not be "taken for granted" as integration will not happen on its own.
He said that "a comprehensive strategy for integration" is necessary "in language, housing, workplace, [and] schools".
"We underestimated the pace of integration," he admitted, referring to Labour's initiatives while the party were in power.
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