UK archbishop slams plan to send migrants to Rwanda
The scheme has sparked outrage and widespread criticism from human rights organisations and even the UN.
And Welby, who as the Archbishop of Canterbury is the Church of England's highest cleric, added his voice to the dissent in his Easter Day address.
While "the details are for politics and politicians," Welby suggested that sending asylum seekers overseas posed "serious ethical questions.
"The principle must stand the judgement of God and it cannot," Welby said.
A country like Britain informed by Christian values cannot "sub-contract out our responsibilities, even to a country that seeks to do well like Rwanda," the church leader continued.
It "is the opposite of the nature of God."
When unveiling the policy last week, Prime Minister Boris Johnson had already suggested there could be legal challenges to the plans.
But the interior ministry, or Home Office, which is in charge of implementing the policy, argued that Britain's current system was "broken" and pointed to unprecedented global migratory pressures.
Johnson has pledged to do "whatever it takes" to ensure the plans work -- but the UN refugee agency UNHCR condemned the scheme as an "egregious breach of international law."
According to an exchange of letters published by the Home Office, the ministry's top civil servant, Matthew Rycroft, stressed on the eve of the announcement his doubts about both the expected "deterrent effect" of the scheme and its cost.
But Home Secretary Priti Patel said it would be "imprudent" to delay a measure that "we believe will reduce illegal migration, save lives, and ultimately break the business model of the smuggling gangs".
According to Rwanda, the British government will fund the deal by up to 120 million pounds ($157 million, 144 million euros) and migrants would be "integrated into communities across the country."
British media from the left-leaning Guardian to the conservative Daily Telegraph on Saturday warned the policy could spark a "mutiny" among civil servants tasked with making the scheme operational.
For Tahsin Tarek, a 25-year-old glazier from Arbil, the capital of Iraq's Kurdistan region, who is saving up to finance a new trip to Europe, the British announcement is a game changer.
"I'm going to think about another country," he told AFP on Saturday.
"To live here and endure the difficulties here is better than living in Rwanda.
"I don't think anyone will accept this decision and go live there. If they give the refugees a choice between being expelled to Rwanda or their country, they will choose their own country."