How many movies have David Horovitch and John Walker collaborated on?

They have worked on 4 movies together! Their first movie together was Miss Marple: The Murder at the Vicarage (1986) while their highest rated movie together was Miss Marple: The Mirror Crack'd from Side to Side (1992). They have not worked together since Miss Marple: The Mirror Crack'd from Side to Side (1992). They are most known for their tv movie films together.