PHED MARK LONDON is Mark Wiens’ London restaurant pop-up. It’s in quite the location: lower ground floor of Platapian on London’s Greek street, Soho. Writing this with urgency: it’s open till the end of May. Platapian stays, who knows about Phed Mark. Pronounced Ped Mark. Phed เผ็ด being the Thai word for spicy.  Ever-growing is his niche;…