CREATE TABLE table_56480 ("Race" TEXT, "Circuit" TEXT, "Date" TEXT, "Pole position" TEXT, "Fastest lap" TEXT, "Winning driver" TEXT, "Constructor" TEXT, "Tyre" TEXT, "Report" TEXT)

Who was the winning driver of the British Grand Prix where Giuseppe Farina had the fastest lap?
SELECT "Winning driver" FROM table_56480 WHERE "Fastest lap" = 'giuseppe farina' AND "Race" = 'british grand prix'
SELECT "Winning driver" FROM "table_56480" WHERE "Fastest lap" = 'giuseppe farina' AND "Race" = 'british grand prix'