South West England is one of nine official regions of England. It is the largest in area, covering 9,200 square miles (23,800 km), 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.

Can we conclude that is cornwall in the south west of england?
yes