England

England was a geographical region of Earth in the country of United Kingdom. It was frequently visited by the Doctor, who had adopted much of its customs, dress, and other cultural elements. The capital of England was London.

'English'
The term 'English' can be used to describe the common language shared as primary language between the United Kingdom, United States of America and Australia (and other countries) and spoken by much of the world, it being said, especially in the early 21st century for the Eurozone to know English, than teach the world other languages. (EDA: Trading Futures)

English can also be used to refer to people, products or objects from England. The Doctor told Ian Chesterton and Barbara Wright that the eggs and bacon provided by the TARDIS' food machine contained 'English bacon'. (DW: An Unearthly Child)