 The church , which is a main location for the film , was substantially set @-@ dressed . Despite having several original medieval wall paintings , the largest addition was the creation of the medieval mural by artist Margot <unk> . To create the impression of an austere country church , Victorian stone flags were replaced with brick pavers for the duration of filming and the original wall paintings covered up . <unk> <unk> and other modern additions were covered up or removed . The churchyard had several gravestones added , including the large box tomb which is a focus of several scenes . 
