Today marks two years since Muhammadu Buhari was sworn in to power as Nigeria’s president but his deputy Yemi Osinbajo marked the occasion without him.

But Mr Osinbajo mentioned Mr Buhari in his speech:

“I bring you good wishes from President Muhammadu Buhari, who as we all know is away from the country on medical vacation.”

The 74-year-old went to London for medical treatment on 7 May and has not been heard from or seen since.

The nature and seriousness of the illness are unknown as presidential aides told reporters at a briefing in Abuja last week that they would not answer questions about Mr Buhari’s health.