Hatice Cengiz while in London said “I believe that the Saudi regime knows where his body is: they should answer my demand, for this is not only the demand of a fiancee but a human and Islamic demand.”

“I want justice to be served – not only for those who murdered my beloved Jamal but for those who organised it and gave the order for it. These questions are not just my questions: they are being asked by millions.

“I want the role of the political leadership in this brutal killing to be brought to light.”

She also attacked US President Donald Trump who has limited his criticism of the Saudi leader, a close ally, and stressed the importance to the American economy of arms sales to the country.

“I am deeply grateful for the solidarity of people all over the world,” Cengiz said. “I am, however, disappointed in the actions of the leadership in many countries, particularly in the US.

“President Trump should help reveal the truth and ensure justice be served. He should not pave the way for a cover-up of my fiancee’s murder. Let’s not let money taint our conscience and compromise our values.”