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_19529639_3 (second_national_tour_year_2 VARCHAR, original_west_end_cast VARCHAR)

### Question ###
How many different actors from the Second national tour year 2 played the character played by Oliver Tompsett from the original West End cast?

### Accurate SQL ###

SELECT COUNT(second_national_tour_year_2) FROM table_19529639_3 WHERE original_west_end_cast = "Oliver Tompsett"