I know that we have our linguistic differences, but some Americans truly love the English language. I usually refer (and defer) to The Chicago Manual of Style (though I can't use italics here!). To tell you the truth, I often find myself having to reread sentences in British books because of the way commas are used; I think our practice is in some ways clearer (modifiers are less likely to "stray", for example). Anyway, I thought that British comma use may have "evolved" differently from ours so as to no longer demand that names be thus set off.