Two days after 2016 Brussels bombings, former head of MI6 Richard Dearlove suggested that the UK's security would be improved by leaving the EU, arguing that leaving the EU would enable Britain to dump the European Convention on Human Rights and have greater control over immigration from EU. Although Home Secretary Theresa May cited European Arrest Warrant as a reason for her backing the Remain campaign, Dearlove argued that the importance of European Arrest Warrant was exclusively related to crime.