For the purposes of the lieutenancy it remains part of the ceremonial county of Dorset.
Since then it has been part of the nonmetropolitan county of Dorset.
British Dictionary definitions for Dorset
a county in SW England, on the English Channel: mainly hilly but low-lying in the east: the geographical and ceremonial county includes Bournemouth and Poole, which became independent unitary authorities in 1997. Administrative centre: Dorchester. Pop (excluding unitary authorities): 398 200 (2003 est). Area (excluding unitary authorities): 2544 sq km (982 sq miles)