South East England is one of the nine official regions of England in the United Kingdom at the first level of ITL for statistical purposes. It consists of the counties of Buckinghamshire, East Sussex, Hampshire, the Isle of Wight, Kent, Oxfordshire, Berkshire, Surrey and West Sussex. Major towns and cities in the region include Brighton and Hove, Canterbury, Milton Keynes, Southampton, Portsmouth, Slough, Reading and Oxford.

England is a country that is part of the United Kingdom. The country is located on the island of Great Britain, of which it covers roughly 62%, and over 100 smaller adjacent islands. It has land borders with Scotland to the north and Wales to the west, and is otherwise surrounded by the North Sea to the east, the English Channel to the south, the Celtic Sea to the south-west, and the Irish sea to the west. Continental Europe lies to the south-east, and Ireland to the west. The population was 56,490,048 at the 2021 census. London is both the largest city and the capital.