There is also a class divide regarding immigration and the view taken on it.
As a general rule the affluent and political class do not see immigration as a problem but an advantage, as in a source of low wage non unionised labour. It's also seen as a way of removing national identity, which is considered a threat by those in charge who wish to pursue a policy of globalisation.
The working and middle classes are more likely to view unrestricted immigration as a threat for the opposite reasons and also they are the neighborhoods in which such immigrants would be housed.

It all boils down to whether you are in an income bracket to house yourself and educate your children away from low cost sources.

Does anyone still seriously believe that years of largely unrestricted immigration have been an asset to the uk ? Yes the employers of these people do and that's it, and they don't live or send their kids to school where their employees do !!!!!