ANDREW MACASKILL BRITISH officials repeatedly warned the government not to pursue its plan to send migrants to Rwanda and the country was initially excluded from the shortlist of partner countries because of human rights concerns, London's High Court was told. Under an agreement struck in April, Britain will send tens of thousands of migrants who arrive on its shores illegally more than 4,000 miles (6,4000 km) to the East African country. The first planned deportation flight last month was blocked by a last-minute injunction from the European Court of Human Rights.  The government has vowed to press ahead with the…