<prompt> Pedzisa mutsara unotevera: Mathieson akapinda muERA E-Type naLeslie Johnson semutyairi, nokuda kwe1949 Richmond Trophy, Jersey Road Race uye British Empire Trophy, pamwe chete ne  <response>: Mubairo Mukuru weBritain wa1950. 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. 