What do we call the person who announces news and events in a medieval town?

The story behind the answer

In medieval towns, official announcements were delivered aloud in streets and squares, usually after ringing a handbell and crying “Oyez! Oyez!” so everyone could hear. This role proclaimed royal edicts, market days, curfews, and local news, ensuring even the illiterate were informed. Many proclamations had to be spoken publicly to take legal effect, which is why the office was formally recognized and protected.

A herald served nobles at courts and tournaments and managed coats of arms; a parish beadle was a minor church officer and poor-law functionary; and a bellman was often a night watchman or just a later synonym. The public news-announcer in the town square is the role described by the answer.