By default, Drupal outputs menus as this:
How can you add an ID (or class) to the menu e.g.:
I've spent ages searching for an answer, but there only seems to be techniques for modifying the
<li> of the ULs (and not the ULs of themselves).
Being able to assign IDs/Classes is essential to target specific menus, so I'm surprised a solution isn't more readily available.