UK Foreign Office backed ICC prosecutor days before Cameron allegedly threatened defunding

Like dropping a hydrogen bomb—then defund the court entirely
Cameron's characterization of the consequences if the ICC pursued warrants for Israeli leaders, according to sources with access to the call's minutes.
Mark

Why would the Foreign Office recommend supporting Khan if Cameron was about to pressure him?

Mimi

That's the central puzzle. Langrish's memo was written in good faith—she believed a meeting would strengthen the relationship. But Cameron's call eight days later suggested a different agenda entirely.

Mark

Did Cameron actually threaten to defund, or was he just warning Khan about political pressure?

Mimi

The sources who saw the minutes of the call say he stated the UK would "defund the court and withdraw from the Rome Statute" if warrants were issued. Cameron's own adviser later reframed it as a warning about party pressure, not a direct threat. The distinction matters legally.

Mark

Why didn't Cameron meet Khan himself on April 15?

Mimi

The emails show officials debated whether he should attend at all. We don't know the final reason he didn't show up—whether it was his choice or the Foreign Office's. But sending Chalk instead meant Khan had to repeat his intentions to someone with less authority.

Mark

Has Khan's allegation of a threat campaign been substantiated?

Mimi

Khan submitted a statement to the court describing multiple instances of pressure. Cameron's call is one piece of what Khan characterizes as a broader effort to dissuade him from pursuing Israeli warrants. Other actors and governments may have done the same.

Mark

What happens now?

Mimi

The foreign affairs committee has been asked to investigate. Cameron hasn't responded publicly. The Foreign Office continues to decline comment. The question is whether parliament will actually hold an inquiry into whether a serving foreign secretary threatened an international court.

  • Newly declassified emails expose a striking contradiction at the heart of British foreign policy — official advisers were urging support for the ICC at the very moment Cameron allegedly threatened to destroy that support.
  • Cameron reportedly told Khan by phone on April 23, 2024 that issuing arrest warrants for Netanyahu and Gallant would be 'like dropping a hydrogen bomb,' warning of profound consequences for Britain and his own party.
  • The alleged threat — that the UK would defund the ICC and withdraw from the Rome Statute — came just days after the Foreign Office's own legal adviser had called a show of support for Khan 'advantageous and timely.'
  • Khan has since submitted a formal statement to the court alleging a coordinated campaign of threats against his office in the lead-up to the warrant requests, naming Cameron's call as a central example.
  • A source close to Cameron acknowledged the call occurred and described it as 'robust,' framing it as a warning rather than a threat — a distinction that may matter little to those calling for a parliamentary investigation.

In the spring of 2024, Britain found itself speaking from two mouths at once — its legal advisers urging warm embrace of the International Criminal Court while its Foreign Secretary allegedly threatened to defund it should the court dare to pursue Israeli leaders. Declassified emails obtained through a Freedom of Information request reveal the gap between Britain's stated commitment to international justice and the private pressure reportedly applied by David Cameron to ICC prosecutor Karim Khan. The episode raises an enduring question that haunts powerful nations and their relationship to universal law: whether international institutions are supported as ends in themselves, or merely as instruments to be discarded when inconvenient.

In April 2024, Britain's Foreign Office was sending contradictory signals about its relationship with the International Criminal Court. Sally Langrish, the Foreign Office's top legal adviser, had recommended that Foreign Secretary David Cameron meet with ICC prosecutor Karim Khan to demonstrate Britain's 'strong support' for the court. The meeting, she argued, would be timely and advantageous — and Khan had specifically requested Cameron himself attend.

Cameron did not attend. Justice Secretary Alex Chalk went in his place on April 15, where Khan outlined his intention to seek arrest warrants for Israeli Prime Minister Benjamin Netanyahu, former Defence Minister Yoav Gallant, and several Hamas leaders.

Eight days later, Cameron phoned Khan while the prosecutor was on an official visit to Venezuela. According to sources with knowledge of the call, Cameron warned that pursuing warrants against Israeli leaders would be 'like dropping a hydrogen bomb,' carrying profound implications for Britain and his own Conservative Party. He then stated that if such warrants were issued, the UK would defund the ICC and withdraw from the Rome Statute entirely.

The gap between Langrish's memo and Cameron's phone call raises serious questions about whether Britain's public support for the court was ever genuine. Khan has since alleged in a formal statement to the court that he faced a coordinated campaign of threats before requesting the warrants, citing Cameron's call as a key example. The Foreign Office has declined to comment.

A source close to Cameron confirmed the call took place and described it as 'robust,' insisting his remarks were a warning about Conservative Party pressure rather than a personal threat. The distinction has done little to quiet critics. In June 2024, former Scottish First Minister Humza Yousaf called on parliament's foreign affairs committee to investigate, saying Cameron 'has to be held to account' on what he described as a matter of the utmost seriousness.

In April 2024, Britain's Foreign Office was sending two contradictory signals about its commitment to the International Criminal Court. Sally Langrish, the Foreign Office's top legal adviser, had recommended that then-Foreign Secretary David Cameron meet with ICC prosecutor Karim Khan to demonstrate Britain's "strong support for the Court and for Karim Khan as its prosecutor." The meeting, she argued, would be "advantageous and timely" for maintaining good relations with the institution. This advice came in the days before Cameron was scheduled to see Khan in London on April 15.

But the declassified emails, obtained through a Freedom of Information request and reported by Declassified UK, reveal that officials had hesitated about whether Cameron should attend at all. Some in the Foreign Office considered sending a lower-ranking official instead. Langrish pushed back, noting that it was neither unusual nor improper for a prosecutor to meet with a foreign secretary, and that Khan had specifically requested the meeting with Cameron himself.

What happened next, according to multiple sources familiar with the events, contradicted the Foreign Office's stated position entirely. Cameron did not meet Khan on April 15. Instead, Justice Secretary Alex Chalk attended the meeting in his place. During that conversation, Khan outlined his intention to seek arrest warrants for Israeli Prime Minister Benjamin Netanyahu and former Defence Minister Yoav Gallant, as well as for Hamas leaders Yahya Sinwar, Ismail Haniyeh, and Mohammed Deif.

Eight days later, on April 23, Cameron phoned Khan while the prosecutor was on an official visit to Venezuela. According to sources with knowledge of the call and access to its minutes, Cameron told Khan that pursuing warrants against Netanyahu and Gallant would be "like dropping a hydrogen bomb." He warned that such warrants would carry "profound implications" for Britain and within his own Conservative Party. Cameron then stated that if the ICC issued warrants for Israeli leaders, the United Kingdom would "defund the court and withdraw from the Rome Statute"—the treaty that established the ICC and allows member states to exit through written notification to the UN secretary-general.

The contrast between Langrish's memo and Cameron's subsequent phone call raises questions about whether the Foreign Office's public position on supporting the ICC was genuine or merely diplomatic cover. Khan himself has now alleged in a statement to the court that he faced a coordinated campaign of threats in the lead-up to his office requesting warrants against Israeli leaders, citing Cameron's call as a key example. The Foreign Office has declined to comment on the matter repeatedly.

Cameron, now a Conservative peer in the House of Lords, did not respond to requests for comment. However, a source close to Cameron told journalist Peter Oborne, author of the book "Complicit: Britain's Role in the Destruction of Gaza," that the call did take place and was "robust." This source characterized Cameron's remarks not as a threat but as a warning that voices within the Conservative Party would push for defunding and withdrawal if warrants were issued. In June 2024, former Scottish First Minister Humza Yousaf called for the UK parliament's foreign affairs committee to investigate the incident, saying that Cameron "has to be held to account" on "a matter of the utmost seriousness."

It is not unusual, nor improper, for the Prosecutor to meet with a Foreign Secretary to discuss general ICC issues. The meeting would be advantageous and timely for us, showing our strong support for the Court and for Karim Khan as its prosecutor.
— Sally Langrish, Foreign Office legal adviser
Lord Cameron has to be held to account. We are talking about a matter of the utmost seriousness here. We need to know whether a serving British foreign secretary at the time threatened to defund the International Criminal Court.
— Humza Yousaf, former Scottish First Minister
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