I'm not going to argue the toss on this, but it is generally considered that BMC's Competitions Department under Marcus Chambers, Stuart Turner and then Peter Browning was the most successful, and it covers our period up to 1970 when it was disbanded by Leyland. Also, Dagenham's first new post-war model was the 1947 V8 Pilot, and as David Burgess-Wise comments in one of his histories of Ford in Britain - "In an era of austerity and vehicle and fuel rationing, the Pilot seemed like totally the wrong car for the times, but its effortless progress endeared it to those who could obtain an extra petrol allowance, like doctors and farmers".