| Artist name | Roles | Recordings |
|---|---|---|
| Free (60s/70s UK blues rock group) | ||
| The Groundhogs | ||
| Deep Purple (English rock band) |
| Artist name | Roles | Recordings |
|---|---|---|
| Free (60s/70s UK blues rock group) | ||
| The Groundhogs | ||
| Deep Purple (English rock band) |
| Artist name | Roles | Recordings |
|---|---|---|
| Free | engineer | All Right Now (BBC session), Fire and Water (BBC session) |
| The Groundhogs | engineer | Eccentric Man (live), Garden (live) |
| Deep Purple | vocal | Introduction |