The successful defendants, who have each been awarded costs, are Jean Oliver from Lanarkshire in Scotland, David Polden and Emma Sangster, both from London, and Renate Zauner from Switzerland.
The trial took place on 21-22 October, 2009, but the defendants had to return to court this afternoon to hear the judgment.
A fifth defendant, Barbara Dowling, from Glasgow, pleaded guilty on 21 October and was given an 18-month conditional discharge and ordered to pay £85 in costs.
For further information and quotes, see earlier press releases:
Aldermaston blockade blog: