The UN high commissioner for refugees says the migrants crisis is now a global phenomenon and that simply turning them away “won’t work”.

Filippo Grandi told the BBC that more nations had to help the “few countries” shouldering the burden, by increasing both funding and resettlement.

He said that, last year, fewer than 1% of 20 million refugees had been resettled in another nation.

More are fleeing conflict and hardship than at any other time in history.

Mr Grandi was speaking to the BBC during a day of special live coverage examining how an age of unprecedented mobility is shaping our world.

Later, the UN refugee agency’s special envoy, Angelina Jolie-Pitt, will deliver a keynote speech, in which she will warn about the “fear of uncontrolled migration” and how it has “given space, and a false air of legitimacy, to those who promote a politics of fear and separation”.