SCHEMA:
CREATE TABLE table_13079788_3 (round INTEGER, gt3_winner VARCHAR, pole_position VARCHAR)
USER:
what is the maximum round for gt3 winner hector lester tim mullen and pole position of jonny cocker paul drayson

QUERY:
SELECT MAX(round) FROM table_13079788_3 WHERE gt3_winner = "Hector Lester Tim Mullen" AND pole_position = "Jonny Cocker Paul Drayson"