The United Kingdom has allocated an additional £100 million to Rwanda this year in accordance with the agreement to relocate asylum seekers to the African nation.

This payment, disclosed by Sir Matthew Rycroft, the top civil servant at the Home Office, was made in April, following a previous payment of £140 million to Rwanda.

Sir Matthew also indicated that another payment of £50 million is anticipated for the coming year.

This revelation follows shortly after Rishi Sunak expressed his commitment to resurrecting the plan following the resignation of the immigration minister earlier in the week.

The initiative, introduced by then-Prime Minister Boris Johnson in April 2022, aims to process asylum seekers in Rwanda to discourage them from crossing the English Channel in small boats.

Despite facing legal challenges and experiencing multiple delays, no asylum seekers have been relocated from the UK to Rwanda thus far.

The total cost of the policy, previously acknowledged to be at least £140 million, was disclosed by Sir Matthew in response to calls for updated figures.

He had previously refrained from providing real-time costs, citing the government's decision to present the expenses on an annual basis.

On Friday morning, Mrs Hillier told BBC Radio 4's Today programme that the figures were only revealed after repeated inquiries, and that there have been no updates when the situation changes.

She said it is "unconscionable" that MPs are expected to vote on the emergency Rwanda legislation next week "without understanding fully what the costs are so far, what they're expected to deliver, and what the costs are going forward."

"It almost looks like the government's got something to hide," she said.

Sir Matthew stressed that the extra payments were not linked to the new treaty signed this week between UK and Rwanda as part of the government's attempt to amend the policy, which was ruled unlawful by the Supreme Court last month.

A Home Office spokesperson would not go into specifics on what the money would be spent on but said it was going towards the economic development and growth of Rwanda.

The payment was made when Suella Braverman was home secretary, though allies of hers say it was signed off by the prime minister.

Labour branded the revelation of the extra costs "incredible", with shadow home secretary Yvette Cooper adding: "How many more blank cheques will Rishi Sunak write before the Tories come clean about this scheme being a total farce?" she said.

Earlier on Thursday, Mr Sunak held a press conference where he urged Tory MPs to back his plan.

The prime minister was speaking a day after immigration minister Robert Jenrick resigned over the government's revised policy, saying he believed it was destined for failure.

Mr Sunak insisted the new emergency legislation set out by the government would end the "merry-go-round of legal challenges" over the flights of some asylum seekers to Rwanda.

The bill compels judges to treat Rwanda as a safe country and gives ministers the powers to disregard sections of the Human Rights Act. But it does not go as far as allowing them to dismiss the European Convention on Human Rights, as some on the right of the Conservative Party have called for.

The bill faces opposition from MPs in different factions of the Conservative Party when it returns to Parliament next week.

Also on Thursday, former Home Secretary Suella Braverman reiterated that it would fail to "stop the boats" and called on the government to fully exclude international law.

The task of steering the bill through Parliament falls to Michael Tomlinson, who was appointed illegal migration minister on Thursday.

He will work alongside Tom Pursglove, the minister for legal migration, after the prime minister split Mr Jenrick's vacant role in two.

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