The 1973 British Formula Three season was the 23rd season of the British Formula 3 season. It consisted of three championships. Tony Brise won the John Player and Lombard F3 (shared with Richard Robarts) Championships, whilst Ian Taylor won the Forward trust Championship.
Champion: 
Ian Taylor
Runner-up: Tony Brise
Ran over 14 rounds, the scoring system was 9-6-4-3-2-1 points to the first six classified finishers.
| Round | Circuit | Date | Pole Position | Winning Driver | Winning Team |
|---|---|---|---|---|---|
| 1 | Thruxton | 25 March | Tony Brise | Ian Taylor | Chris Andrews |
| 2 | Snetterton | 1 April | Mike Wilds |  Alan Jones | DART Racing with GRD |
| 3 | Mallory Park | 6 May | Tony Brise | Ian taylor | Chris Andrews |
| 4 | Brands Hatch | 20 May | Brian Henton | Richard Robarts | Myson Racing with GRD |
| 5 | Silverstone | 10 June |  Matt Spitzley | Tony Brise | Team Kent Messenger Racing |
| 6 | Thruxton | 17 June | Ian Taylor | Ian Taylor | Chris Andrews |
| 7 | Cadwell Park | 15 July | Alan Jones | Race cancelled | |
| 8 | Thruxton | 5 August | Mike Wilds |  Michel Leclère | Alpine Renault |
| 9 | Croft | 12 August | Mo Harness | Mike Wilds | Dempster International Racing Team |
| 10 | Brands Hatch | 19 August | Mo Harness | Ian Taylor | Chris Andrews |
| 11 | Castle Combe | 27 August |  N/A | Ian Taylor | Chris Andrews |
| 12 | Silverstone | 9 September | Mike Wilds | Brian Henton | driver |
| 13 | Thruxton | 16 September | Ian Taylor | Tony Brise | Team Kent Messenger Racing |
| 14 | Thruxton | 28 October |  Luis Antonio Siqueira Veiga [1] | Richard Robarts | Myson Racing |
| Source: [2] [3] | |||||
| Place | Driver | Entrant | Total |
|---|---|---|---|
| 1 | Ian Taylor | Chris Andrews | 64 |
| 2 | Tony Brise | Team Kent Messenger Racing | 42 |
| 3 | Richard Robarts | Myson Racing | 32 |
| 4 | Mo Harness | driver | 24 |
| 5 | Leonel Friedrich | driver | 23 |
| Source: [4] | |||
Champion: Tony Brise
Runner-up: Alan Jones
Ran over 14 rounds, the championship used a 20-15-12 points system with double points at the final race.
| Round | Circuit | Date | Pole Position | Winning Driver | Winning Team |
|---|---|---|---|---|---|
| 1 | Silverstone | 8 April | Russell Wood | Russell Wood | Chequered Flag-Peter Bloore Racing |
| 2 | Oulton Park | 20 April | Tony Brise | Russell Wood | Chequered Flag-Peter Bloore Racing |
| 3 | Mallory Park | 23 April | N/A | Alan Jones | DART Racing/GRD Ltd |
| 4 |  Zandvoort | 20 May |  Masami Kuwashima | Alan Jones | DART Racing/GRD Ltd |
| 5 | Oulton Park | 28 May | Leonel Friedrich |  Conny Andersson | GeKås Kläder |
| 6 |  Monaco | 2 June | N/A | Jacques Laffite | BP France |
| 7 | Paul Ricard | 1 July | Alain Serpaggi | Jacques Laffite | BP France |
| 8 | Silverstone | 14 July | Alan Jones | Tony Rouff | AB3 Racing Developments |
| 9 | Brands Hatch | 29 July | Tony Brise | Tony Brise | Team Kent Messenger Racing |
| 10 | Paul Ricard | 2 September | N/A | Michel Leclère | Societé des Automobiles Alpine |
| 11 | Brands Hatch | 30 September | N/A | Brian Henton | Team Ensign |
| 12 | Oulton Park | 7 October | Larry Perkins | Alan Jones | DART Racing with GRD |
| 13 | Mallory Park | 14 October | Richard Robarts | Mike Wilds | Dempster International Racing Team |
| 14 | Brands Hatch | 21 October | Ian Taylor | Tony Brise | Team Kent Messenger Racing |
| Source: [2] [3] | |||||
| Place | Driver | Entrant | Total |
|---|---|---|---|
| 1 | Tony Brise | Team Kent Messenger Racing | 123 |
| 2 | Alan Jones | DART Racing with GRD | 121 |
| 3 | Russell Wood | Chequered Flag-Peter Bloore Racing | 119 |
| 4 | Jacques Laffite | BP France | 112 |
| 5 | Ian Taylor | Colin Andrews | 78 |
| Source: [4] | |||
Champions: Tony Brise, Richard Robarts
Runner-up: Mike Wilds
Ran over 11 rounds, the scoring system was 9-6-4-3-2-1 points to the first six classified finishers. Double points were awarded at the last race and the fastest lap was worth 1 or 2 points.
| Round | Circuit | Date | Pole Position | Winning Driver | Winning Team |
|---|---|---|---|---|---|
| 1 | Brands Hatch | 4 March | Tony Brise | Russell Wood | Chequered Flag-Peter Bloore Racing |
| 2 | Silverstone | 18 March | Alan Jones | Alan Jones | DART Racing with GRD |
| 3 | Snetterton | 13 May | Masami Kuwashima | Tony Brise | Team Kent Messenger |
| 4 | Brands Hatch | 24 June | Richard Robarts | Tony Brise | Team Kent Messenger |
| 5 | Silverstone | 1 July | Derek Lawrence | Richard Robarts | Myson Racing |
| 6 | Snetterton | 8 July | Alan Jones | Ian Taylor | Chris Andrews |
| 7 | Mallory Park | 22 July | Mike Wilds | Brian Henton | driver |
| 8 | Oulton Park | 11 August | Richard Robarts | Mo Harness | Team Modus Racing with Shellsport |
| 9 | Silverstone | 27 August | Tony Brise | Alan Jones | DART Racing with GRD |
| 10 | Oulton Park | 8 September | Alan Jones | Tony Brise | Team Kent Messenger |
| 11 | Brands Hatch | 4 November | Tony Brise | Richard Robarts | Myson Racing |
| Source: [2] [3] | |||||
| Place | Driver | Entrant | Total |
|---|---|---|---|
| 1 | Tony Brise | Team Kent Messenger Racing | 52 |
| Richard Robarts | Myson Racing | 52 | |
| 3 | Mike Wilds | Dempster International Racing Team | 33 |
| 4 | Russell Wood | Chequered Flag-Peter Bloore Racing | 29 |
| 5 | Alan Jones | DART Racing with GRD | 25 |
| Ian Taylor | Chris Andrews | 25 | |
| Source: [4] | |||