§ [These cover all non-jet aircraft, the quieter jets and, to the extent that this can be demonstrated in practice, other jets whose take-off at reduced weight matches that of the quieter lets at maximum weight.]
| Summer | Heathrow | Gatwick |
| 1978 | 1,700 | 3,100 |
| 1979 | 1,900 | 3,400 |
| 1980 | 2,100 | 3,700 |
| 1981 | 2,300 | 4,000 |
| Winter | Heathrow | Gatwick |
| 1978–79 | 1,400 | 1,700 |
| 1979–80 | 1,600 | 1,850 |
| 1980–81 | 1,800 | 2,000 |