 Brian McGuire akatanga kukwikwidza muBritish-based Shellsport G8 International Series muna 1976, semunhu akapinda neFormula One-spec Williams FW04. Akapindawo mumotokari yeBritish Grand Prix ya1976asi rakangonyorwa bedzi sorusununguko uye harina kutongopinda munhangemutange. Nokuda kwemwaka wa1977 McGuire akaita shanduko huru kuWilliams uye yakapinda mu1977 British Grand Prix seMcGuire BM1. Zvisinei, motokari yacho yakanga isingakwanisi kukwikwidzana mumisangano yakakosha yekugadzirira, inononoka kupfuura vamwe vose vanopinda kunze kwaMikko Kozarowitzky uyo akave nenjodzi, uye McGuire akakundikana kuzviita kusvika kumisangano yakakwana. Brian McGuire akaurayiwa ari pachigaro chemotokari paBrands Hatch gare gare muna 1977. 