The special adviser to the president on media and publicity, Femi Adesina, has announced in a statement on February 5, Friday, that President Muhammadu Buhari has begun a short vacation.

According to Adesina, while Buhari is on vacation,
Vice President Yemi Osinbajo will perform the
functions of the president.
The presidential aide said in compliance with Section
145 (1) of the Nigerian Constitution, Buhari had
dispatched a formal notice of his vacation to the
Senate President and the Speaker of the House of
Representatives.
Buhari has arrived in London to attend a conference
on the ongoing Syrian crisis. The Supporting Syria &
the Region conference is co-hosted by the UK,
Germany, Kuwait, Norway and the UN and focuses on
how to step up efforts to assist millions of Syrians
displaced by the conflict, which started in 2011.
The leader of the nation was expected back to Nigeria
at the weekend.
There were speculations that President Buhari visited
London because he needs medical treatment.
It's Buhari's first vacation as Nigerian President.