Douglas, Isle of Man, Great Britain
Circuit Type: Temporary street circuit
Glencrutchery Road/Governor’s Road section retained with return leg on Central Promenade
Extension: 6,240 Km
Lap Record: 3:08.000
Year: 1950
Driver: Reg Parnell
Car: Maserati 4CLT/48
Speed: 117,268 Km/h
Pole Record: 3:06.000
Year: 1949
Driver: Reg Parnell
Car: Maserati 4CLT/48
Speed: 120,852 Km/h
| Year | Official Name | Date | Winning Driver | Constructor | Laps | Time | Formula |
|---|---|---|---|---|---|---|---|
| 1950 | 12th British Empire Trophy | June 15 |  Bob Gerard |
ERA |
36 | 01:59:36.800 | F1EC |
| 1949 | 11th British Empire Trophy | May 26 | Bob Gerard |
ERA |
36 | 01:57:54.000 | GP |
| 1948 | 10th British Empire Trophy | May 25 | Geoffrey Ansell |
ERA |
36 | 02:03:45.000 | GP |
| 1947 | 9th British Empire Trophy | August 21 | Bob Gerard |
ERA |
40 | 02:16:52.000 | GP |
| 1937 | V RAC International Light Car Race | June 3 |  Prince Bira |
ERA |
50 | 02:45:34.000 | VOIT |
New layout to the north of the Glencrutchery Road/Governor’s Road section
Extension: 6,44 Km
Lap Record: 3:20.000
Year: 1936
Driver: Richard Seaman
Car: Delage 15S8
Speed: 115,9 Km/h
Pole Record: 3:16.000
Year: 1936
Driver: Earl Howe
Car: ERA B
Speed: 118,2 Km/h
| Year | Official Name | Date | Winning Driver | Constructor | Laps | Time | Formula |
|---|---|---|---|---|---|---|---|
| 1936 | IV RAC International Light Car Race | May 28 | Richard Seaman |
 Delage |
50 | 02:52:01.000 | VOIT |
Track extended to a hairpin on Central Promenade
Extension: 6,5 Km
Lap Record: 3:06.000
Year: 1935
Driver: Brian Lewis
Car: Bugatti T59
Speed: 125,7 Km/h
Pole Record: 3:08.000
Year: 1935
Driver: Charles Martin
Car: Bugatti T59
Speed: 124,4 Km/h
| Year | Official Name | Date | Winning Driver | Constructor | Laps | Time | Formula |
|---|---|---|---|---|---|---|---|
| 1935 | III Mannin Moar | May 31 | Brian Lewis |
Bugatti |
50 | 02:40:11.000 | GP |
Glencrutchery Road used to increase speeds
Extension: 5,889 Km
Lap Record: 2:50.000
Year: 1934
Driver: Brian Lewis
Car: Alfa Romeo Tipo B/P3
Speed: 124,7 Km/h
| Year | Official Name | Date | Winning Driver | Constructor | Laps | Time | Formula |
|---|---|---|---|---|---|---|---|
| 1934 | II Mannin Moar | June 1 | Brian Lewis |
 Alfa Romeo |
50 | 02:25:41.000 | GP |
| 1934 | II Mannin Beg | May 30 | Norman Black |
MG |
50 | 02:34:37.000 | VOIT |
Original Circuit
Extension: 7,4 Km
Lap Record: 4:10.000
Year: 1933
Driver: Brian Lewis
Car: Alfa Romeo 8C-2300 Monza
Speed: 106,6 Km/h
| Year | Official Name | Date | Winning Driver | Constructor | Laps | Time | Formula |
|---|---|---|---|---|---|---|---|
| 1933 | I Mannin Moar | July 14 | Brian Lewis |
Alfa Romeo |
50 | 03:34:52.000 | GP |
| 1933 | I Mannin Beg | July 12 | Freddie Dixon |
Riley |
50 | 04:13:35.000 | VOIT |