Magistrate’s message released to mark 200th anniversary may be first account of bloodshed

It was a defining moment in British political history, paving the way in the long struggle for democratic representation of the disenfranchised working classes.

Now, 200 years on from the Peterloo massacre in which peaceful protesters were cut down by sabre-wielding cavalry, a hastily scribbled note has been unearthed to reveal what could be the first account of the bloodshed.