Lundan Cabbie":3czemigs said:Balham_Green":3czemigs said:Where is the definition that a Derby is about distance?
List of sports rivalries. ... Games between two rivals of close geographical proximity are usually called a local derby, or simply just derby (UK: /ˈdɑːrbi/; DAR-bee or US: /ˈdɜːrbi/; DER-bee); a sporting fixture between two teams from the same town, city or region, particularly in association football.
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South West England is one of nine official regions of England. It is the largest in area, covering 9,200 square miles (23,800 km2),[1] and consists of the counties of Gloucestershire, Bristol, Wiltshire, Somerset, Dorset, Devon and Cornwall, as well as the Isles of Scilly. Five million people live in South West England.
Courtesy of Wikipedia
Devon and Bristol are in the same Region thus meeting Lundan's quoted requirement for a Derby. It is therefore a Derby