Despite winter's approach, the flow of refugees and other migrants to Europe is showing no sign of slowing.

The Greek island of Lesbos alone is receiving 7,000 new arrivals a day, with the UN warning that the total for October could exceed 200,000.

It poses a huge challenge for the Greek authorities and the UN, as the system for registering and relocating the migrants faces collapse.

Ian Pannell reports from Lesbos.