They are communities that live together, look alike and share a common background. To the uninitiated, there is no discernible difference. But a report will today claim that many Indian communities in Britain are blighted by caste discrimination. Researchers detail claims that many of the 50,000 Dalits in the UK - once known as India's lower-caste "untouchables" - suffer discrimination from other castes in terms of jobs, healthcare, politics, education and schools.