| Name | Count | Years active |
|---|---|---|
| Purnell | 610 | 1958-1960, 1968-1989 |
| Macdonald | 109 | 1986-1991 |
| Purnell Books | 23 | 1969, 1978, 1980-1986 |
| Macdonald Purnell | 23 | 1951, 1985-1986, 1988 |
| Sampson Low, Marston | 20 | 1976 |
| (Distributed by Purnell) | 20 | 1976 |
| Richards Press Ltd | 10 | 1976 |
| P. Lang | 7 | 1992-1994, 1997 |
| D.V. Publications Ltd | 6 | 1976 |
| Dobson | 4 | 1976 |