| 6.2.1966 | 24 h Daytona | 79 | Sprite | Richards / Cuomo | Autosport | NC |
| 6.3.1966 | BRSCC Brands Hatch [Marque] | | Sprite | John Maun | | raced |
| 6.3.1966 | BRSCC Brands Hatch [Marque] | | Sprite | Brian Ashwood | | raced |
| 20.3.1966 | 60 minute Juarez [Handicap 2.0] | | Sprite Mk I | Marc Ferland | | 2nd |
| 20.3.1966 | 60 minute Juarez [Handicap 2.0] | | 100-4 | | | raced |
| 26.3.1966 | 12 h Sebring | 66 | Sprite | Aaltonen / Baker | Donald Healey Motor Co. | 29th |
| 26.3.1966 | 12 h Sebring | 67 | Sprite | Hawkins / Mäkinen | Donald Healey Motor Co. | 18th |
| 3.4.1966 | SCCA National Marlboro [CP+DP] | 23 | 3000 | James Brown | | DNA |
| 3.4.1966 | SCCA Regional Kirker Creek [CM+DM+EM+FM+GM+DP] | 26 | Sprite | Ron Sears | | DNA |
| 3.4.1966 | SCCA Regional Kirker Creek [CM+DM+EM+FM+GM+DP] | 37 | Sprite | David Campbell | | DNA |
| 3.4.1966 | SCCA Regional Kirker Creek [CM+DM+EM+FM+GM+DP] | 91 | | Manuel Inacio | | DNA |
| 3.4.1966 | SCCA Regional Kirker Creek [CM+DM+EM+FM+GM+DP] | 96 | 3000 | William Maier | | DNA |
| 11.4.1966 | Sussex Trophy Goodwood | 123 | 3000 | Ted Worswick | E. A. Worswick | ?th |
| 11.4.1966 | Sussex Trophy Goodwood | 124 | 3000 | Clive Baker | C. Baker | DNA |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 133 | Sprite | Roger Eccles | R. Eccles | raced |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 135 | Sprite | Peter Smith | P. J. Smith | ?th |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 136 | Sprite | David MacRae | D. I. MacRae | raced |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 137 | Sprite | C. J. P. Davis | C. J. P. Davis | raced |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 138 | Sprite | Terry Watts | D. T. Watts | raced |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 141 | Sprite | John Moore | R. Groves | raced |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 142 | Sprite | David Corderoy | Cortune Engineering Co. Ltd. | ?th |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 151 | 3000 Mk III | Lionel Mayman | L. Mayman | 3rd |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 156 | Sprite | E. Ward | E. Ward | raced |
| 11.4.1966 | BRSCC Mallory Park [GT] | 157 | 3000 | Bill Viney | W. F. Viney | ?th |
| 11.4.1966 | BRSCC Mallory Park [Marque] | 157 | 3000 | Bill Viney | W. F. Viney | DNA |
| 11.4.1966 | SA SCC Roy Hesketh | | | Nicho Fouché | | ?th |
| 16.4.1966 | LCCC Oulton Park [Sports/GT] | 30? | 3000 Mk III | Ted Worswick | Ted Worswick | raced |
| 17.4.1966 | SMRC Ingliston [Marque 1.2] | 62 | Sprite | J. I. Johnson | J. I. Johnson | DNA |
| 17.4.1966 | SMRC Ingliston [Marque 1.2] | 64 | Sprite | Tom Walkinshaw | T. Walkinshaw | 4th |
| 17.4.1966 | SMRC Ingliston [Marque 1.2] | 66 | Sprite | Ian Kirkwood | I. W. N. Kirkwood | DNA |
| 17.4.1966 | SMRC Ingliston [Marque 1.2] | 67 | Sprite | D. G. G. Black | D. G. G. Black | DNA |
| 17.4.1966 | SMRC Ingliston [Marque 1.2] | 69 | Sprite | Andrew Hutchison | W. Shepherd | 2nd |
| 17.4.1966 | SMRC Ingliston [Marque 1.2] | 74 | Sprite | Al Fleming | A. Fleming | DNA |
| 24.4.1966 | BARC Brands Hatch [Marque] | 126 | 3000 | Stewart Hands | G. J. Bristow | DNA |
| 24.4.1966 | BARC Brands Hatch [Marque] | 150 | Sprite | John Britten | J. Britten | DNA |
| 24.4.1966 | BARC Brands Hatch [Marque] | 151 | Sprite | Keith Grant | K. L. Grant | DNF |
| 24.4.1966 | BARC Brands Hatch [Handicap] | 152 | Sprite | J. W. Nicholls | R. M. Doidge | raced |
| 24.4.1966 | BARC Brands Hatch [Marque] | 152 | Sprite | R. M. Doidge | R. M. Doidge | DNA |
| 24.4.1966 | MWCSCC Lynndale Farms [Main] | | | Bill Maloney | | ?th |
| 1.5.1966 | SCCA National Virginia [CP+DP] | 33 | 3000 | James Brown | | DNF |
| 7.5.1966 | 750 MC Silverstone [S+1.4] | 8 | 3000 | W. H. Ramsden | W. H. Ramsden | DNA |
| 7.5.1966 | 750 MC Silverstone [S+1.4] | 30 | 100 M | Mike Westminster | M. Westminster | DNA |
| 7.5.1966 | 750 MC Silverstone [S+1.4] | 31 | 100 | M. P. Wakefield | M. P. Wakefield | DNA |
| 7.5.1966 | 750 MC Silverstone [S+1.4] | 35 | 3000 | Bill Viney | W. F. Viney | DNA |
| 7.5.1966 | BARC Oulton Park [Marque] | 45 | 3000 | Stewart Hands | G. J. Bristow | 3rd |
| 7.5.1966 | BARC Oulton Park [Marque] | 61 | Sprite | J. M. Dean | J. M. Dean | 12th |
| 7.5.1966 | BARC Oulton Park [Marque] | 62 | Speedwell Sprite GT | Terry Watts | Terry Watts | 11th |
| 8.5.1966 | 500 mile Brands Hatch | 14 | 3000 | Collings / Jackson | R. A. Collings | DNA |
| 8.5.1966 | 500 mile Brands Hatch | 15 | 3000 Mk III | Lionel Mayman | L. Mayman | DNA |
| 8.5.1966 | 500 mile Brands Hatch | 44 | Sprite | Garton / Corderoy | Corture Engineering Co. Ltd. | 15th |
| 8.5.1966 | 500 mile Brands Hatch | 45 | Speedwell Sprite GT | Grant / White | K. L. Grant | 17th |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 51 | Sprite | Al Fleming | A. Fleming | DNA |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 52 | Sprite | J. C. Forsyth | J. C. Forsyth | 4th |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 54 | Sprite | Andrew Hutchison | W. Shepherd | DNA |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 57 | Sprite | W. Ness | A. I. Gray | DNA |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 58 | Sprite | J. I. Johnson | J. I. Johnson | 5th |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 59 | Sprite | D. G. G. Black | D. G. G. Black | DNA |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 60 | Sprite | John Moore | Richard Groves Racing | 2nd |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 61 | Sprite | Ian Kirkwood | I. W. N. Kirkwood | 3rd |
| 8.5.1966 | SMRC Ingliston [Marque 1.2] | 62 | Sprite | Tom Walkinshaw | T. D. Walkinshaw | DNA |
| 8.5.1966 | Targa Florio | 162 | 3000 Mk III | Worswick / Minshaw | Ted Worswick | DNF |
| 8.5.1966 | Targa Florio | 194 | Sebring Sprite | Davidson / Wheeler | Coburn Improvements | DNS |
| 8.5.1966 | Targa Florio | 208 | Sprite | Aaltonen / Baker | Donald Healey Motor Co. | 20th |
| 15.5.1966 | SCCA National Cumberland [DP] | 23 | 3000 | James Brown | James Brown | DNA |
| 22.5.1966 | 1000 km Spa | 19 | Sprite | Harris / Garton | Donald Healey Motor Co. | 11th |
| 22.5.1966 | 1000 km Spa | 20 | Sprite | Poole / Harris | Donald Healey Motor Co. | 13th |
| 28.5.1966 | MCMRC Oulton Park [Sports] | 4 | Speedwell Sprite GT | Terry Watts | Terry Watts | DNF |
| 28.5.1966 | MCMRC Oulton Park [Sports] | 5 | Sprite | Robert Gibson | Robert Gordon Gibson | DNA |
| 28.5.1966 | AMOC Silverstone [S1.6] | 38 | Sprite | J. K. Palmer | J. K. Palmer | DNA |
| 28.5.1966 | MCMRC Oulton Park [Sports] | 44 | 3000 Mk III | Ted Worswick | Ted Worswick | DNA |
| 28.5.1966 | MCMRC Oulton Park [GT] | 44 | 3000 Mk III | Ted Worswick | Ted Worswick | DNA |
| 28.5.1966 | AMOC Silverstone [S+1.6] | 96 | 100 | T. Knowles | T. Knowles | DNA |
| 28.5.1966 | MCMRC Oulton Park [Sports] | 154 | | Geoff Goldstraw | Geoff Goldstraw | DNA |
| 28.5.1966 | MCMRC Oulton Park [Sports] | 155 | 3000 Mk II | Royston Hill | Royston Hill | DNS |
| 28.5.1966 | MCMRC Oulton Park [GT] | 155 | 3000 Mk II | Royston Hill | Royston Hill | DNF |
| 29.5.1966 | Hockenheim [S1.6] | | Speedwell Sprite GT 2A | Walter Helfert | | 11th |
| 30.5.1966 | Whitsun Goodwood [Marque] | 27 | Sprite | John Moore | R. Groves | DNA |
| 30.5.1966 | Whitsun Goodwood [Marque] | 31 | Sprite | Roger Eccles | R. Eccles | DNA |
| 30.5.1966 | Whitsun Goodwood [Marque] | 32 | Sprite | Keith Grant | K. L. Grant | DNA |
| 30.5.1966 | Whitsun Goodwood [Marque] | 33 | Sprite | David Hall | D. C. R. Hall | DNA |
| 30.5.1966 | Whitsun Goodwood [Marque] | 34 | Sprite | John Maun | J. D. Maun | DNA |
| 30.5.1966 | Whitsun Goodwood [Marque] | 36 | Sprite | J. H. Carr | L. T. Gibbins | DNA |
| 30.5.1966 | Whitsun Goodwood [Marque] | 37 | Sprite | W. A. Cooper | J. Jeffcoat | DNA |
| 30.5.1966 | NSCC Silverstone [Marque] | 85 | Sprite | Tony Meade-King | A. Meade-King | raced |
| 30.5.1966 | NSCC Silverstone [Marque] | 87 | Sprite | Andy Belcher | Andy Belcher | raced |
| 30.5.1966 | NSCC Silverstone [Marque] | 88 | Sprite | Alan Woode | A. D. Woode | raced |
| 30.5.1966 | NSCC Silverstone [Marque] | 89 | Sprite | David Crook | David Crook | ?th |
| 30.5.1966 | NSCC Silverstone [Marque] | 90 | Sprite | Philip Tucker | Philip Tucker | raced |
| 30.5.1966 | NSCC Silverstone [Marque] | 91 | Sprite | Bill Graham | W. G. Graham | raced |
| 30.5.1966 | NSCC Silverstone [Marque] | 92 | Sprite | Alan Goodwin | Alan J. Goodwin | ?th |
| 30.5.1966 | NSCC Silverstone [Marque] | 94 | Sprite | John Elvers | John Elvers | ?th |
| 30.5.1966 | NSCC Silverstone [SR] | 94 | Sprite | John Elvers | John Elvers | raced |
| 30.5.1966 | NSCC Silverstone [Marque] | 102 | 3000 | Hargreave Isaac | H. T. Isaac | raced |
| 30.5.1966 | NSCC Silverstone [Marque] | 103 | 3000 | W. H. Ramsden | W. H. Ramsden | DNA |
| 30.5.1966 | NSCC Silverstone [Marque] | 104 | 3000 | Stewart Hands | Stewart W. Hands | 3rd |
| 30.5.1966 | NSCC Silverstone [Marque] | 112 | Sprite | Alec Poole | Speed Sport Conversions | 1st |