Communicative behavior of the British

Since World War II, Britain has become increasingly diverse as it has accommodated large immigrant populations, particularly from its former colonies such as India, Pakistan and the West Indies. The mixture of ethnic groups and cultures make it difficult to define “Britishness” nowadays.
The terms 'English' and 'British' do not mean the same thing. 'British' denotes someone who is from England, Scotland, Wales or Northern Ireland. 'English' refers to people from England. People from Scotland are 'Scots', from Wales ‘Welsh’ and from Northern Ireland ‘Irish’. Be sure not to call someone Welsh, Scots, or Northern Irish ‘English’.