The CRE uses the term racial group, in the context of racial discrimination cases with the definition given in the Race relations Act 1976 that is, to cover groups defined by common race, colour, ethnic origin, national origin, or nationality (including citizenship). Please note that it is a matter of rulings by the courts - not of CRE house style - that certain groups have the status of racial groups under the Race Relations Act while others have not for example, that Sikhs, Jews and Irish Travellers qualify, but Muslims and Rastafarians do not.

an extended family that has inbred to some extent

an extended family that is