| England and Wales | ||
| Number of operatives employed | Number of authorities | |
| October 1974(2) | April 1976 | |
| 0 | 3 | 1 |
| 1–5 | — | — |
| 6–10 | 4 | 3 |
| 11–19 | 12 | 6 |
| 20–30 | 24 | 23 |
| 31–50 | 39 | 42 |
| 51–70 | 41 | 42 |
| 71–99 | 52 | 54 |
| 100–249 | 132 | 135 |
| 250–499 | 66 | 62 |
| 500–999 | 57 | 61 |
| 1,000 and over | 27 | 28 |
| All authorities | 457 | 457 |
| (1) Local authorities are the GLC, London boroughs, counties and districts. | ||
| (2) Figures are not available for April 1974 because of local government reorganisation. |
§ In all, these English and Welsh local authorities employed 140,000 operatives in October 1974 and 147,000 in April 1976. In addition to these manual workers, the local authorities employ administrative, professional, technical and clerical staff on the design, management and control of construction work which may be carried out either by direct labour or by contractors.