Buhari pictured taking a stroll on the street of London

There are claims that APC presidential candidate gen buhari is in london on health matters but that is a news I cannot confirm, the truth is that buhari is in london but I dont know if its because of his health, because of this APC posted a picture of buhari taking a stroll on the street of london with mamman daura and they said he is hail and hearty... see a pic that caused the controversy below: