Crathorne has been also president of the Cleveland Sea Cadets, of the Cleveland Family History Society as well as of the Hambleton District of the Campaign to Protect Rural England (CPRE) since 1988. He was patron of the Cleveland Community Foundation from 1990 to 2004, and president of the Cleveland and North Yorkshire branch of the Magistrates' Association from 1997 to 2003. For the Joint Committee of the National Amenity Societies, he was deputy chair between 1993 and 1996 and chair between 1996 and 1999.