MICHAEL HOLDEN and SAM TOBIN BRITAIN'S plan to send migrants to Rwanda is unlawful because the East African country is not a safe country, lawyers for a group of asylum seekers told the Court of Appeal in London on Monday. Prime Minister Rishi Sunak's government wants to send thousands of migrants more than 4,000 miles (6,400 km) away to Rwanda as part of a 140 million pound ($174 million) deal agreed upon last year. It regards the plan as central to deterring record numbers of asylum seekers arriving in small boats across the Channel from France, something Sunak has made…