President Muhammadu Buhari, who left Nigeria 45 days ago to resume treatment for an undisclosed medical condition believed to be cancer, has developed speech difficulties, presidency sources said today. Previously, Mr. Buhari was also said to be suffering memory lapses. The latest revelation stems from recent attempts to return the President to Nigeria by members of a cabal managing his health and using it to deceive Nigerians.
Several of President Buhari’s aides who traveled with him are reportedly not in touch with him, reports say, while others were ordered to return to Nigeria, with nobody having any certainty about the prospects of Mr. Buhari’s date of return.

During his last trip Saharareporters revealed that his London doctors rejected the idea of his returning to work. They asked that he remained in London for four months to see how best they could treat his illness. Nonetheless, the cabal managing the president brought him back to enable him to undertake a number of acts including military postings and appointments that would have been impossible with an acting President on seat.
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When the President was leaving for the airport, he shocked his aides when he asked if they were going to Sokoto, perhaps one of the first signs of his deteriorating memory.
It has now been learnt that President Buhari has not spoken to Acting President Yemi Osinbajo by telephone since his departure. Only last week, the Acting President was asked to await a phone call from Mr. Buhari but when a call eventually came in, nothing coherent was heard from Mr. Buhari, despite the cabal having kept telling people of his “tremendous” improvement.

Source:
http://saharareporters.com/2017/06/20/buhari-suffers-speech-impairment-london