Yes, that is the Islay. They are both the same size. I have never used the brannock. However, I am a size UK 9 in every Crockett Jones shoe I have tried on. I am also a UK 9 in John Lobb, Church's, Nike trainers and Edward Green with their new resin last they are using. I am a typical US 10 as well. The Islay may fit slightly roomier, however I don't feel like I could size down a half size.