The man is a professional buffoon. He genuinely didn't know if he would be pro or anti brexit until the last minute. A game, smart opportunist. There's an essay online I can't find now where somebody sees him do the "Oh god, I've lost my speech, I'll just talk extemporaneously" schtik twice and realises the buffoonery is a deliberate strategy to disarm.

Article Title says Netherlands ; while Leiden is actually in Holland, let's not use Holland as it is too often mistaken as being the same as the Netherlands. Holland (north and south) is a part of the Netherlands.