I admit this is puzzling. Coincraft has the obverse legend at EDWAR R ANGL DNS HYB on the drawing but quotes EDWAR ANGL DNS HYB in the text. The broken lefthand spear on the crown, bifoliate crown, lettering and hairstyle makes me agree with Edward II class 11a. You don't specify size but as there are no halfpennies in the series from canterbury, it must be a penny!