| Type: | GP |
| Country: | Isle of Man |
| Grand Prix: | British Empire Trophy |
| Date: | 25 May |
| Year: | 1948 |
| Official Name: | X British Empire Trophy |
| Location: | Douglas Circuit Douglas, Isle of Man |
| Course Length: | 6.244km (03.88miles) |
| Distance Laps: | 36 |
| Distance Length: | 224.79km (139.68miles) |
| Pole Driver: | Bob Gerard |
| Pole Country: | GBR |
| Pole Team: | ERA |
| Pole Time: | 3:10 |
| Fast Driver: | Reg Parnell |
| Fast Country: | GBR |
| Fast Team: | Maserati |
| Fast Driver2: | Leslie Johnson |
| Fast Country2: | GBR |
| Fast Team2: | ERA |
| Fast Time: | 3:13 |
| First Driver: | Geoffrey Ansell |
| First Country: | GBR |
| First Team: | ERA |
| Second Driver: | David Hampshire |
| Second Country: | GBR |
| Second Team: | Delage |
| Third Driver: | Leslie Brooke |
| Third Country: | GBR |
| Third Team: | ERA |
The 10th British Empire Trophy was a Formula One motor race held on 25 May 1948 at the Douglas Circuit, in Douglas, Isle of Man. The 36-lap race was won by ERA driver Geoffrey Ansell. David Hampshire finished second in a Delage, and Leslie Brooke was third in an ERA. Bob Gerard started from pole position in his ERA but retired with brake problems. Reg Parnell (Maserati) and Leslie Johnson (ERA) set joint fastest lap.[1] [2]
| Pos | No. | Driver | Entrant | Constructor | Time/Retired | Grid |
|---|---|---|---|---|---|---|
| 1 | 10 |  Geoffrey Ansell | Geoffrey Ansell | ERA B-Type | 2:03:45, 108.93kph | 6 |
| 2 | 12 | David Hampshire | Joe Ashmore | Delage 158L | +43s | 11 |
| 3 | 16 | Leslie Brooke | Leslie Brooke | ERA B-Type | +1:34 | 7 |
| 4 | 22 | Cuth Harrison | T.C. Harrison | ERA B-Type | +1 lap | 15 |
| 5 | 24 | Leslie Johnson | Leslie Johnson | ERA E-Type | +2 laps | 24 |
| 6 | 4 | Gordon Watson | Gordon Watson | Alta | +3 laps | 21 |
| 7 | 52 | Guy Jason-Henry | Selbourne Mayfair | Delahaye 135S | +4 laps | 18 |
| 8 | 6 | Michael Chorlton | Michael Chorlton | Bugatti Type 51A | +6 laps | 22 |
| 9 | 42 | Archie Baring | A.A. Baring | Maserati 6CM | +12 laps | 17 |
| Ret | 40 | Reg Parnell | Reg Parnell | Maserati 4CL | 35 laps, out of fuel | 2 |
| Ret | 38 | Bob Ansell | Reg Parnell | Maserati 4CL | 28 laps, brakes | 4 |
| Ret | 14 | John Bolster | P.H. Bell | ERA B-Type | 25 laps, half-shaft | 9 |
| Ret | 26 | Raymond Mays | Raymond Mays | ERA B-Type | 21 laps, supercharger | 5 |
| Ret | 50 | Tony Rolt | A.P.R. Rolt | Alfa Romeo Tipo B | 12 laps, rear axle | 3 |
| Ret | 54 | Paul Emery | Emeryson Cars | Emeryson-Duesenberg | 12 laps, transmission | 8 |
| Ret | 48 | Roy Salvadori | Roy Salvadori | Maserati 4CM | 10 laps, valve | 20 |
| Ret | 20 | Bob Gerard | Bob Gerard | ERA B-Type | 9 laps, accident | 1 |
| Ret | 30 | Wilkie Wilkinson | Reg Parnell | ERA E-Type | 5 laps, connecting rod | 13 |
| Ret | 32 | Peter Walker | Peter Walker | ERA B-Type | 4 laps, engine | 19 |
| Ret | 36 | Duncan Hamilton | George Abecassis | Maserati 6CM | 4 laps, accident | 10 |
| Ret | 2 | George Abecassis | George Abecassis | Alta GP | 2 laps, gearbox | 12 |
| DNS | 18 | Sheila Darbishire | Sheila Darbishire | ERA B-Type | 23 | |
| DNS | 40 | Fred Ashmore | Reg Parnell | Maserati 4CL | car driven by Parnell | 14 |
| DNS | 44 | John Gordon | John Gordon | Maserati 6CM | 16 | |