Capital letters should always be used for proper nouns, at the beginning of sentences and in acronyms. As capital letters are more difficult to read, do not use them in any other context.
Use capital letters for proper nouns, which are names that refer to a specific thing.
World Health Organization
Ministry for Health
Population (Statistics) Act 1938
Compass directions and regions
Compass directions and regions are always lower case.
the south-east (direction)
the north (region)
West End (London)
Central America, North America, South America
Use title case for publication titles.
People and jobs
Job titles should be lower case, except when attributed to a person.
John Pullinger, National Statistician
Prime Minister Theresa May
Capital letters are always used for The Queen.
Begin the following words and phrases with a lower case letter:
the census information
member state, accession state
section (when referring to an Act)
spring, summer, autumn, winter
local authority, health authority, unitary authority, ward, clinical commissioning groups