I am American, but have Portuguese nationality. I took political science as my undergrad in the states at a relatively good university and have been living in portugal working for the past two years...i do not want to get my masters in the states and was interested in taking it in the uk...i am interested in diplomacy/international law...does anyone know which schools are the best in the uk for these programs?? because i am having a hard time finding out rankings and things...any help would be greatly appreciated!!

thanks