How many movies have Cecile Hay-Arthur and Dick Mills collaborated on?

They have worked on 4 movies together! Their first movie together was Doctor Who: Revenge of the Cybermen (1975) while their highest rated movie together was Doctor Who: Vengeance on Varos (1985). They have not worked together since Doctor Who: Vengeance on Varos (1985). They are most known for their tv movie films together.