They argue that because the UK already controls its own borders as it is not in the Schengen Area, leaving the EU would not enhance border security.
They argue that the EU would likely make any post-Brexit deal conditional on free movement.
They argue that leaving the EU would start a chain reaction that would destabilise Europe, and in doing so endanger UK security.
They believe the UK gives the EU its ‘backbone’ through its membership.
They believe leaving would be welcomed by Russia, who the UK would have to make a deal with. The Russian President Vladimir Putin is in support of Brexit.
They believe leaving the EU would give the UK the ability to decide who enters the UK.
They argue that the European Convention on Human Rights, which is separate from the EU – prevents the UK from dealing robustly with terrorists.
They believe the EU is a ‘ticking time bomb’ with regards to refugees, terrorism and the Euro crisis, and the UK needs to stay clear.