By Michael Holden LONDON (Reuters) – The British parliament will hold two days of debate over Prime Minister Rishi Sunak’s bill designed to allow Britain to send asylum seekers who arrive illegally 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 fulfill 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 BR…