Sgwrs:Y Weithred (ffilm)

Y Weithred is an S4c movie based on the book 'Cysgod Tryweryn'. Cysgod Tryweryn is Councillor Owain Willaims's account of his part in the bombing of the Tryweryn Dam site in 1963, the dam built in Wales to supply water for Liverpool, which forced out the last monoglot Welsh speaking village from their homes, school, church and farms.