THE British government will try next week to persuade judges at the country's top court to overturn a ruling which declared unlawful its divisive plan to deport to Rwanda asylum seekers who arrive in small boats across the Channel. In a blow to Prime Minister Rishi Sunak's government and his pledge to "stop the boats", London's Court of Appeal concluded in June the scheme to send tens of thousands of migrants more than 4,000 miles (6,400 km) to East Africa was not lawful, saying Rwanda could not be treated as a safe third country. On Monday, government lawyers will argue at the Supreme Court…