UKIP Migration spokesman Steven Woolfe MEP said in response to the ECJ's latest judgement that ruled non-EU nationals illegally entering UK cannot be imprisoned.
said: "This judgement blows a hole in Cameron's argument that the EU makes us more secure. Only Brexit gives us control of who comes here and whether they can be deported at a time of our choosing.
"To sum up – the euro court rules non-EU nationals illegally entering UK cannot be imprisoned. It is insanity to leave it up to the migrants whether they should leave promptly or not.
"Due to our EU membership, being outside Schengen makes no difference when it comes to deporting those illegally entering the UK.
"This ECJ judgement shows that as an EU member, the UK cannot properly protect its borders and its people.
"Only by leaving and EU and the jurisdiction of the ECJ, can we regain control and improve our security."