Saudi Arabia must "play by the rules" if they want to continue a trade relationship with the UK, the director of the University of Buckingham's Centre for Security and Intelligence has said.
Appearing on the breakfast show with Julia Hartley-Brewer, Professor Anthony Glees accused the current Saudi regime of "looking back into the middle ages".
His comments follows President Trump's announcement that the US is asking Turkey for audio and video relating to the alleged killing of missing Saudi journalist, Jamal Khashoggi.
The Washington Post columnist disappeared during a visit to the Saudi consul in Istanbul, and a Turkish newspaper have claimed the consul himself, Mohammed al-Otaibi, can be heard in an audio recording of Mr Khashoggi's death.
Professor Glees said the UK doesn't want to "upset the Saudis" due to its trade relationship with the country, but called for a worldwide "rules-based system" to stop countries from doing "what the hell they like".
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"If the Saudis want to be our long term partners, and clever people and sensible people hope they would be, they must play by the rules.
"We don't want to upset the Saudis. The same is true for the USA. America is their number one supplier of major arms.
"Here we have a situation without doubt something awful has happened.
"But should it influence our future trading relationship? Should it influence the American trading relationship with Saudi? That's the big problem.
"On the other hand, we need to uphold the idea of a rules-based system in the world. Everywhere we're seeing big tough men do what the hell they like."