Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_26739 ( "Series No." real, "Episode No." real, "Title" text, "Directed by" text, "Written by" text, "UK Ratings (BBC2 Rank)" text, "Original air date" text )

### Question ###
Who wrote the episode what had the rating 2.27m (5)?

### Accurate SQL ###

SELECT "Written by" FROM table_26739 WHERE "UK Ratings (BBC2 Rank)" = '2.27m (5)'