The Testing of Eric Olthwaite (1977)

Eric Olthwaite is so boring that his family all leave home to escape him. Then one day he is accidentally caught up in a bank robbery and discovers that the robber shares his interests in shovels, black pudding and rainfall so they team up to make daring raids to steal rainfall records. As a result Eric becomes famous and is considered interesting again, so much so that he is made the mayor of Denley Moor.