Input (grade 13): Hamilton's mother, Carmen Larbalestier (now married as Carmen Lockhart), is white British, while his father, Anthony Hamilton, is black British, making him mixed-raced, (Anthony Hamilton's parents emigrated from Grenada to the United Kingdom in the 1950s).
Output (grade 8): His mother, Carmen Larbalestier (now Carmen Lockhart) is British. His father's parents emigrated from Grenada to the United Kingdom in the 1950s.