Labour 'deliberately let migrants in to make Britain more multicultural and so Tories could be accused of racism'Ministers today faced calls for an inquiry into claims that their open-door immigration policy was designed to make Britain more multicultural and allow Labour to portray the Tories as racists.A former Labour adviser alleged that the Government opened up Britain's borders in part to try to humiliate Right-wing opponents of immigration.The Conservatives said that if true, the claim demonstrated 'disgracefully irresponsible' decision-making and called for an investigation.Former Labour...