Other ships have a class (e.g. Pillar of Autumn being a Halcyon-class Cruiser and etc.), so why hasn't this ship's class been stated anywhere?
Before anyone suggests, destroyer is not the class. The UNSC Gorgon is a Gorgon-class destroyer, but it is very visually different from the Midlothian so she also can't be a Gorgon-class.