Britishness
Brit•ishBrE /ˈbrɪtɪʃ/
NAmE /ˈbrɪtɪʃ/
adjective
word origin
more about1 (abbr. Br.) connected with the United Kingdom of Great Britain and Northern Ireland or the people who live there
example bank
the British GovernmentHe was born in France but his parents are British.British-based/British-born/British-made 2 the British noun [plural] the people of the United Kingdom 
Brit•ish•ness /BrE ˈbrɪtɪʃnəs; NAmE ˈbrɪtɪʃnəs/ noun [uncountable]
There is no singular noun which is commonly used to refer to a person from Britain. Instead the adjective 
note at 