The entry for Ned Coates in the Discworld Companion is as follows:
Constable in the Night Watch when Sam Vimes was a new recruit. Promoted to lance-corporal by Sergeant Keel. A freethinker, probably a revolutionary at heart and a better fighter than Keel in every respect except that of unscrupulous cunning. A hero of the Glorious Revolution of 24/25 May (it happened overnight).
I’ve just been re-reading Night Watch - I always wondered who Ned Coates REALLY was?
He just seems to be far too good a street fighter to be an ordinary watchman, he is more like an outside “specialist” brought in for a job by some secret organisation. . .especially the way he is able to be in the right place at the right time by getting into the special mob that Carcer brings out to silence Keel after the revolution is over when he turns out to be on Keel’s side at the end.
The end of Night Watch confused me...
I remember that Ned was part of Carcer's group in the heated battle, and that Vimes warned him to go far away, knowing what would happen to him.
And after Sam returned to the future, Ned apparently died.