The refugee crisis shows we can't be isolated from the world's geopolitical troubles.

We're not isolated from the world. The world knocks on our door.

Brexit is the other face of the refugee crisis - tensions that lead to stasis, external risks that lead to asymmetric shocks.

The refugee crisis is a challenge for the whole of Europe, and Europe - it's a very fair point to say it's not just a security issue. It's also an economic issue.

We have a great history; we have a great humanist face to put forward to the world.

A nation ringed by walls will only imprison itself.