Five problems with UK immigration control post-Brexit

Most Leave voters expected Brexit to deliver a cut in immigration. In fact, says Patrick McGovern, they may see the very opposite. Points-based systems like the one advocated by Ukip do not cut migration. He discusses the possibility of a last-minute surge in EU migration, the effect of family reunification and the risk that irregular migrants will find new routes. Additionally, the porous Irish border with Northern Ireland poses a challenge for the UK Border Agency, which has already struggled to implement its e-borders policy.