David Cameron has visited camps in Lebanon and Jordan to meet Syrian refugees who have fled their country's civil war.
The Prime Minister has called on other EU countries to "step up to the plate" and follow Britain's lead by funding refugee camps around Syria.
Mr Cameron said there was a "direct connection" between shortfalls in aid for camps in Lebanon, Jordan and Turkey and the influx of migrants into Europe.
On the day UN chief Ban Ki-moon told ITV News that Britain should do more to help the influx of refugees arriving into Europe, hundreds more Syrians reached the safety of Greece.
One passenger ferry docked in the Athens port of Piraeus with 2,500 on board. They came via the Greek island of Lesbos, where smaller boats are arriving unchallenged.
ITV News Senior International Correspondent John Irvine reports.
On a visit to Jordan, David Cameron says that the EU must "follow Britain's lead" and fund more refugee camps around Syria.
The prime minister has insisted the UK will not participate in plans to redistribute 160,000 refugees who have arrived in Europe.
Train traffic with Austria suspended as German authorities seek to reduce the number of asylum seekers arriving in the country.