Britishness is a concept that seeks to develop or more often define what it is to be 'British'.

Britishness and Multiculturalism
In 2005 the Commission for Racial Equality published a report entitled Citizenship and Belonging : What is Britishness?, to examine the way in which British people of different ethnic backgrounds thought about Britishness. The Commission reported that:
"As White people involved in the study were asked to talk about Britishness, many immediately and spontaneously changed the topic of discussion slightly talking instead about a perceived decline in Britishness. This happened in all focus groups with White people. They attributed the decline to four main causes: the arrival of large numbers of migrants; the 'unfair' claims made by people from ethnic minorities on the welfare state; the rise in moral pluralism; and the failure to manage ethnic minority groups properly, due to what participants called political correctness."
And that:
"Most White participants were distressed by this perceived decline in Britishness. They felt victimised and frustrated and many anticipated that social unrest would become inevitable."