By Michael Holden LONDON (Reuters) – Britain’s parliament is set to vote on Prime Minister Rishi Sunak’s bill to allow the government to send asylum seekers who arrive without permission in Britain to Rwanda amid deep divisions in his Conservative Party on the issue. Last November, the UK Supreme Court declared the policy unlawful and Sunak hopes the new legislation, when passed, will override legal concerns and fulfil his pledge to stop people arriving across the Channel in small boats. Here are details about the plan and the migration issue: WHY IS IMMIGRATION SUCH AN ISSUE IN BRITAIN? Takin…