by traditional definitions, derby is the county town of derbyshire, although derbyshire's administrative centre has in recent years been matlock. on 1 april 1997 derby city council became again a unitary authority (a status it had held, as a county borough, up until 1974) with the rest of derbyshire, having been administered from matlock. on 7 july 2014, derby's first ever youth mayor, belal butt (a student from chellaston academy), was elected by the mayor of derby.