This is a report on the third effort to formulate an effective question for determining the ethnicity of respondents to Great Britain's 1981 census. Discussed herein is the response to the ethnic origins questions, different versions of which were incorporated into the main census pre-test and administered to 4250 households (including large subsamples of Indians, Turks, and West Indians). Also described are the quality of answers to the ethnicity question, difficulties in filling out the forms registered by respondents, and respondents' objections to particular questions. Appended to the report are a description of sampling procedures and field methodology and copies of the four alternate forms used in the survey. (GC)