United Kingdom — Security Service & United States

United Kingdom — Security Service: United Kingdom — Security Service, a United Kingdom intelligence agency, was accused of being aware of Abu Zubaydah's torture and sending questions to the United States — Central Intelligence Agency for his interrogation, contributing to the United Kingdom's complicity.

United States: The United States held Abu Zubaydah at Guantanamo Bay and its United States — Central Intelligence Agency conducted torture at 'black sites', with the United Kingdom being accused of complicity in these actions.

United Kingdom — Security Service: The United Kingdom — Security Service opened an investigation against Andriy Portnov in 2018 on suspicion of state treason, alleging his involvement in Russia's illegal annexation of the Crimean Peninsula, though the case was later closed.

United States: The United States imposed sanctions on Andriy Portnov in 2021 for alleged corruption, describing him as a 'court fixer' who undermined reform efforts in Ukraine.