This is rich, an Englishman worrying about racism in America ?
The UK may have its fair share of racial issues as well, especially the Indian subcontinent vs. Anglo cultural divide, but I do think that the UK is far more progressive about race matters than the US. I've had 6 extensive visits to the UK over the last 12 years, and I've observed that there is far more of a cultural and institutional response to racism and racist attitudes than in the US. The English have dealt with their colonial past and have several cultures - Caribbean, mid-Eastern, African, Indian, and Chinese - blended into their society.
England , in particular, has 60+ million people and is slightly smaller than the state of New York. The English cannot live in geographical disparate enclaves to the same extent that Americans can. In the US, Hispanic live primarily in the South and the West, Blacks historically live in the South or East Coasts industrial cities, affluent Whites live in enclaves in the suburbs, etc... Americans can somewhat isolate themselves in their communities and not reconcile themselves to a multi-cultural identity...