The Campbell Trophy was a non-championship Grand Prix held at Brooklands, Great Britain, in 1937, 1938 and 1939. The most successful driver was Prince Bira. He won the first two races and came second in the third race.
| Year | Date | Class | COLSPAN=3 | Winner! | COLSPAN=3 | Second place! | COLSPAN=3 | Third place! | Report | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. | Driver | Car | No. | Driver | Car | No. | Driver | Car | |||||
| 1937 | May 1 | Over 1500cc | 2 |  Prince Bira | Maserati 8CM | 15 |  Teddy Rayson | Maserati 4C | 21 | Anthony Powys-Lybbe | Alfa Romeo Monza | Report | |
| 1500cc | 15 | Teddy Rayson | Maserati 4C | 6 | Denis Scribbans | ERA B-Type | 5 | Reggie Tongue | ERA B-Type | ||||
| 1938 | April 18 | N/A | Prince Bira | ERA | 5 | Arthur Dobson | ERA | Arthur Hyde | Maserati 8CM | Report | |||
| 1939 | August 7 | N/A | Raymond Mays | ERA D-Type | Prince Bira | Maserati 8CM | Peter Aitken | ERA B-Type | Report |