SELECT "Circuit" FROM table_56878 WHERE "Fastest lap" = 'john surtees' AND "Winning driver" = 'john surtees'
Name the circuit when the fastest lap was john surtees and the winning driver was john surtees.
CREATE TABLE table_56878 (
    "Race" text,
    "Circuit" text,
    "Date" text,
    "Pole position" text,
    "Fastest lap" text,
    "Winning driver" text,
    "Constructor" text,
    "Tyre" text,
    "Report" text
)