President Muhammadu Buhari, who returned Saturday from a 103-day medical vacation in the United Kingdom, may yet return there for medical checkup if need arises, his media adviser said on Monday. Yesterday, President Buhari gave his first address since returning to the country from the UK on Saturday and made no reference to his health. The president called for unity in Nigeria, and said he would renew his fight against problems such as the war against Boko Haram militants, a secessionist uprising in the east and clashes between nomadic herdsmen and farmers.But his spokesman, Femi Adesina, confirmed the president may still leave the country for medical check-ups. The President is currently working from home in Abuja. Presidential spokesperson Malam Garba Shehu told BBC Focus on Africa radio that renovations in Mr. Buhari’s office are to blame.