Britain’s handling of migrants who arrive by small boats from northern France has been unacceptable, ineffective and inefficient, an independent inspection published on Thursday said. The number of people attempting dangerous sea crossings to enter Britain has risen sharply, forcing the government to address criticism from some quarters that border controls are too weak, while others say that those seeking asylum are being treated inhumanely. The inspection, led by Chief Inspector of Borders and Immigration David Neal, focused on the initial processing of migrants at two government centres bet…