For the purposes of research*, I went to buy a Dairy Milk bar.
Sadly, I had not researched closely enough what size I needed, so I bought the one size they had: 49g.
It is, of course, metric, and has been for years.
There is the 'glass & a half' design, but nowhere do the words appear (either in the traditional or the supposed new form). If we are talking about a 227g size, then it could be argued that the graphic itself is misleading.
* Oh, the things I do for the advancement of science, the furtherance of knowledge, and the betterment of all humankind!