Maybe more info can be found through the pictures of Louis Klemantaski, with here a list of his 1953 picture collection.
1953
Monte Carlo Rally (1/53) 270 13 53C2, C53C2,
C52M5
Goodwood (3/53) 187 - 53R1, 53ASJ-E
Mille Miglia (4/53) 540 - 53C3
Goodwood (4/53) 167 - 53R2,53ASJ-I,IB
International Trophy, Silverstone (5/53) 504 12 53R3, 53ASJ-G,M;
C53MJ1
Ulster Trophy, Dundrod (5/53) 312 - 53R4
Crystal Palace (5/53) 214 - 53R5, 53ASJ-K,M
Snetterton (5/53) 132 - 53R6
Le Mans 24 Hours (6/53) 680 13 53C4, C54M3
British Empire Trophy, Isle of Man (6/53) 264 - 53R7
Spa-Francorchamps (m/c) (7/53) 102 - 53C1
Reims 12 Hours & French Grand Prix, 330 - 53C5
Reims (7/53)
Belgian Grand Prix (m/c), Spa (7/53) 108 - 53C1
Crystal Palace (7/53) 20 - 53ASJ-D,M
British Grand Prix, Silverstone (7/53) 357 4 53R8, 53ASJ-B,M;
C53MJ2
Coronation Rally, RR Ghost Club (7/53) 101 - 53R9
German Grand Prix, Nurburgring (8/53) - 34 C54M4
Swiss Grand Prix, Bern (8/53) 112 - 53C6
Spanish M.C. 36 - MC21
Goodwood (8/53) 6 - 53ASJ-C
Goodwood 9 Hours (8/53) 509 - 53R10, 53ASJ-J,M
Monza M/cycle GP 70 - 53M1
Italian Grand Prix, Monza 34 21 53M2, C53M2
Tourist Trophy, Dundrod (9/53) 264 - 53R11
Goodwood (9/53) 242 - 53R12, 53ASJ-A,M
Crystal Palace (9/53) 28 - 53ASJ-H,M
Spanish Grand Prix, Barcelona (m/c) (10/53)
1954
The numbers behind the races are the number of pictures he took of that particular event.
I found this list on:
http://www.klemantaski.com/page1.asp