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Jack Letts, 24, had dual citizenship with the UK and Canada before he left to fight for ISIS in Syria. Before venturing to Syria, Letts had declared himself an “enemy of Britain” but following his capture by Kurdish authorities, he has since asked to return to the UK. However, according to the Daily Mail, the Home Office has striped the ISIS terrorist of his UK citizenship.

The move to strip him of his UK passport was one of the last actions sanctioned by Theresa May. In the wake of that decision, Letts is now the responsibility of the Canadian Government with one Whitehall insider saying, “It’s Canada’s problem now”. Although no country is allowed to make a citizen stateless, due to his Canadian nationality, the Government can, therefore, sanction the removal of his UK passport. The Government’s action has since sparked fury from the Canadian Government. READ MORE: ISIS 'blooper reel' is leaked by Al-Qaeda in bizarre jihadi war

ISIS news: Jihadi Jack's UK citizenship stripped

ISIS news: Canada has responded furiously

A diplomatic source within the Canadian Government has insisted that they have “gone beserk” because he had “very little to do with Canada”. Such is the anger within the Canadian Government that Whitehall officials have suspected that Justin Trudeau’s administration will take a hardline stance on a post-Brexit deal with the UK. Despite Boris Johnson now in power, Home Office sources have stated that new Home Secretary, Priti Patel, had backed the decision. An insider said: “It is Priti’s job to keep the country safe and she will do whatever is in her power to keep terrorist fighters out of the UK, including depriving dual nationals of their British citizenship when it is legal to do so and the intelligence shows there is a threat.” READ MORE: Stacey Dooley's gun trade documentary dropped by BBC

ISIS: Mr Trudeau apparently went "beserk"