Rebecca Helena Grant de Longueuil (born 1982) is an English actress and singer, known for her roles as Daisha Anderson on the BBC medical dr…Rebecca Helena Grant de Longueuil (born 1982) is an English actress and singer, known for her roles as Daisha Anderson on the BBC medical drama Holby City and Heather Irvine on the BBC soap opera Doctors.Grant also has a singing career, and is known by the stage name, Rebecca Swing. Through her father, Michael Grant, 12th Baron de Longueuil, Grant is a second cousin twice removed of Elizabeth II of the United Kingdom.