<page_title> List of Air Ministry specifications </page_title> <section_title> 1930–1939 </section_title> <table> <cell> P.13/36 <col_header> Spec </col_header> </cell> <cell> Twin-engined medium bomber for "world-wide use" introduction delayed due to production difficulties necessitating further order of Whitleys & Wellingtons <col_header> Type </col_header> </cell> </table>
During the 1930s, the British Air Ministry released Specification P.13/36, seeking a twin-engine heavy-medium bomber for "world-wide use".