Simplify the following text for a Grade 8 native English-speaking person.
Original: 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 ) .
Simplified: His mother , Carmen Larbalestier ( now Carmen Lockhart ) is British . His father 's parents emigrated from Grenada to the United Kingdom in the 1950s .