|The beginning of the Gospel of Mark from the Book of Durrow.|
(example of Insular (Gaelic) script, Wikipedia)
Contrary to what most Irish believe, the Uncial script is not their invention. Uncial was derived from "Old Roman Cursive" between the 1st and 2nd century with the oldest known Uncial manuscript found in Egypt. It remained as a high-level book hand until the 12th Century but was not a major influence past Britain. Emerging alongside Uncial in the Roman Empire was Half Uncial, which was a derivative of "New Roman Cursive"