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The UN refugee agency says migrants flocking to the Greek islands of Kos, Lesbos and Chios are facing 'totally shameful' conditions - and rely on volunteers to give them food and water.

Vickie Hawkins, executive director of Médecins Sans Frontières‎ UK, spoke the programme about the problems faced by the migrants and the Greek authorities.

They are coming over in rickety little boats - it's a very difficult journey, she said.

"You have to be pretty desperate."

We're used to this - Greece needs our support, Ms Hawkins told the programme.

We have faced far more difficult displacement situations before, Ms Hawkins told the programme.

"We can do better."