Edit: "u" was another stylistic variation of "v" in minuscule alphabets. So the use of both of them side by side is rather an anachronism as it combines forms of two separate eras.
Edit: Regarding the long form of "s", this is also an important part of the ligature "ß". There's still an ongoing discussion, whether it is for "ſs" (ss) or "ſʒ" (sz), and, if "ß" should be split into "SS" or "SZ" in German uppercase writing. (While entity escaping suggests "szlig", some sources and old typographic forms indicate that it may have been "ſs" originally.)