Fear not, we're all citizens now. Well, almost all.
"On 1 January 1983, upon the coming into force of the British Nationality Act 1981, every citizen of the United Kingdom and colonies became either a British citizen, British Dependent Territories citizen or British Overseas citizen. Use of the term British subject was discontinued for all persons who fell into these categories, or who had a national citizenship of any other Commonwealth country. The category of British subjects now includes only those people formerly known as British subjects without citizenship and people born in the Republic of Ireland before 1949. In statutes passed before 1 January 1983, however, references to British subjects are interpreted as if they referred to Commonwealth citizens."