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_name_43 (built_by_hm_dockyard VARCHAR, laid_down VARCHAR)

### Question ###
Which built by HM Dockyard has September 1830 as the laid down?

### Accurate SQL ###

SELECT built_by_hm_dockyard FROM table_name_43 WHERE laid_down = "september 1830"