 Nyorai kupfuurira kweiyi ndima - Mathieson akapinda ERA E-Type naLeslie Johnson semutyairi, we1949 Richmond Trophy, Jersey Road Race neBritish Empire Trophy, pamwe neBritish Grand Prix ya1950. Mamwe manyuko anotaura izvi sezvinonyorwa zvepamutemo zveERA nokuti Johnson akanga atenga mugadziri wemotokari makore matatu akanga apfuura. Mathieson akatenga 2-litre Frazer Nash Le Mans umo akawana kukunda kwekirasi muna 1950 Maawa makumi maviri nemana eLe Mans pamwe chete naRichard Dickie Stoop. 