Prime Minister Rishi Sunak conducts a press conference on a plan to stop illegal migration on December 7, 2023. | James Manning/WPA/Getty Images There are already legal challenges to the new policy, but authorities detained some migrants this week. The UK is again preparing to deport asylum seekers to Rwanda after Parliament created a workaround to enact a policy the high court declared unlawful. Authorities have begun detaining migrants to dep…