The aim of this survey was to estimate the size and regional distribution of the British population of people registerable under the Disabled Persons (Employment) Act 1944; to estimate the numbers of people eligible for sheltered employment; and to provide information that would permit an assessment of the effectiveness of current provisions for disabled persons, and of the direction that ES services should take in future. Assessment of occupational handicap; employment status of those with handicap; work histories; service requirements. Measurement Scales. OPCS Disability Survey Severity Scale.