Grace Adelaide Jones ( born 7 December 1899 ) is an English supercentenarian , at the age of , she is the oldest person in the United Kingdom and the last British citizen born before 1900 and the youngest living person born before 1900 .
Grace Adelaide Jones ( born 7 December 1899 ) is an English supercentenarian . 
 At the age of , she is the oldest person in the United Kingdom and the last British citizen born before 1900 .