Summary of sources of participants
| Organisation | Means of administration | Response (number mailed) |
|---|---|---|
| RAC Motor Sports Association | Postal | 14 (100) |
| Anonymous Rally Club | Postal | 2 (12) |
| FIA World Rally Championship | Via team doctors | 4 (16) |
| Scottish Amateur Rally Association | Postal | 32 (100) |
| Mobil 1 Welsh Rally | Personal administration | 53 |
| Land Rover Defender 90 Welsh Rally | Personal administration | 13 |
| Total | 118 |