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.
The Archbishop of Canterbury has described David Cameron's plans to resettle 20,000 Syrian refugees as a "very slim response" to the crisis.
Speaking during a House of Lords debate on the Prime Minister's announcement, Most Rev Justin Welby also appeared to suggest that Britain should do more to help European nations cope with the numbers making it to the continent.
While Mr Cameron has insisted there would be no plans to take refugees that had made it to the continent, Most Rev Welby said: "A problem of this scale can only morally and credibly be dealt with by widespread European collaboration."
He noted that the number Mr Cameron's response appeared slight in comparison to the four million refugees created by the conflict, and questioned whether the government may not to raise the numbers taken in further over the next five years.
Nonetheless, he said he warmly welcomed the government's "start" in the area of offering refuge to those displaced by the civil war, adding that the churches are working together "to achieve and support a coherent, compassionate and credible public policy" on the crisis.
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.
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