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But if, and almost certainly when, he is elected as Gabon's head of state on Saturday, Oligui Nguema will face significant challenges.

The King has had a complicated diplomatic balancing act, as head of state of both the UK and Canada, at a time when Canada has been put under great pressure by the Trump administration.

If it takes place, this would be the first call between the two heads of state.

The exclusive organisation - made up of royals, heads of state, former athletes and figures from business and politics - seems resistant to the change that candidates like Coe stood for.

"The heads of state then agreed on the need to continue the discussions initiated in Doha in order to establish solid foundations for lasting peace," it added.