The issue is no longer whether multiculturalism is a good thing, it seems, but what sort of multiculturalism is best. On the Today programme this morning, Keith Vaz, former Europe minister, and professor John Kay, economist, turned to cooking metaphors. So, fondue or salad? Or both?

Perhaps our debate The Strange Career of Multiculturalism can help with the words and theories, the tastes and smells.

And if you're after models for migration, check out People Flow.