In today’s world, many of the threats to Britain's security are global in nature - like the aggression of Russia, terrorism and cross-border crime.
Being in Europe, working with our closest neighbours and partners to tackle these threats, makes Britain safer.
Whether it’s implementing sanctions against Russia, sharing intelligence about terrorists or arresting criminals using the European Arrest Warrant, there is strength in numbers.
Hussein Osman, a terrorist involved in the attempted bomb attack on London in July 2005, is one of over 400 criminals who have been returned to face justice in Britain under the European Arrest Warrant after fleeing to Europe.
He was caught in Italy, brought back to Britain, and sentenced to 40 years imprisonment.
Leaving Europe would threaten our safety. We are stronger and more secure as part of Europe than on our own.