One of the most common mistakes people make is to confuse the terms “Great Britain” and “the United Kingdom (UK)”. The distinction is important not just for geographers, but also for employment lawyers. Great Britain, quite simply, consists of England, Scotland and Wales. The UK includes England, Scotland and Wales, but also includes Northern Ireland (NI). In this article Lynda Macdonald outlines the differences in employment law between Great Britain and NI, and throughout, the term “Britain” is used to denote Great Britain.