his job isnt appealing to the brexit voting masses now,
It's working with some incredibly bright people on a problem of enormous complexity and global importance, behind closed doors mostly. Many of these people will not be sympathetic to his cause, some will be outright hostile. His clowning for the cameras will be irrelevant to them except as a source of mild amusement - hence the smirk
(, Fri 15 Jul 2016, 20:21, Reply)