India is set to clash with Britain over Westminster's new Equality Bill which outlaws caste discrimination as a form of racism.The bill, which has been passed in the House of Lords, has been welcomed by campaigners for India's "dalits" or "untouchables", a caste which suffers extreme violence and persecution, but has been rejected by their government.There are more than 250 million dalits in India, many of whom are denied water, access to schools, and in some cases the right to pass through villages by upper caste Hindus who believe their presence, or even their shadow, pollutes them. Some dalits in India still work as "night soil carriers" – transporting human waste from latrines.