CREATE TABLE table_2430014_8 (directed_by VARCHAR2, uk_ratings__bbc2_rank_ VARCHAR2)

How many directors worked on the episode with 2.27m (5) is the ratings?
SELECT COUNT(directed_by) FROM table_2430014_8 WHERE uk_ratings__bbc2_rank_ = "2.27m (5)"
SELECT COUNT("directed_by") FROM "table_2430014_8" WHERE "2.27m (5)" = "uk_ratings__bbc2_rank_"