fetch_countries.md
In dfeR: Common Department for Education Analysis Tasks

returns expected regions

Code
  fetch_countries()
Output
     country_code                              country_name
  1     E92000001                                   England
  2     K02000001                            United Kingdom
  3     K03000001                             Great Britain
  4     K04000001                         England and Wales
  5     N92000002                          Northern Ireland
  6     S92000003                                  Scotland
  7     W92000004                                     Wales
  8             z       England, Wales and Northern Ireland
  9             z            Outside of England and unknown
  10            z Outside of the United Kingdom and unknown