JUSTIN Tomlinson (Adver letters, August 7) says that changes to Britain’s benefit system will put a stop to the problems at Calais.

But he fails to mention that it was the intervention by Britain that created a power vacuum that allowed ISIS to grow.

ISIS did not exist before Britain joined the bombing campaign for the removal of Saddam Hussein in Iraq and Gaddafi in Libya.

It is the dominance of ISIS in Iraq and Libya that is generating the migration of millions of people away from those crisis-hit areas.

Millions of people are now on the move and small changes to Britain’s benefit system will not halt the civil wars currently raging in both Iraq and Libya.

TERRY HAYWARD Burnham Road, Swindon