Blended wing body aircraft

A blended wing body aircraft, comprising:

• a plurality of wings;
• and
• a main body, wherein the main body comprises:
• a first interior structural element;
• a second interior structural element, wherein the first interior structural element comprises a first wall and the second interior structural comprises a second wall, wherein the first and second walls run longitudinally through a passenger cabin of the aircraft approximately parallel to a longitudinal axis of the aircraft, and wherein each of the first and second walls include a respective pressure bulkhead configured to resist a pressure loading;
• a stiffener attached and extending laterally between the first and second walls;
• a plurality of first tensioners attached at a first end to the first wall and at a second end to the stiffener;
• a plurality of second tensioners attached at a first end to the second wall and at a second end to the stiffener;
• a first cabin bay defining a first space for a first seat category that includes seats for the first seat category;
• and
• a second cabin bay defining a second space for a second seat category wherein the space for the second seat category includes seats for the second seat category wherein a seat of the second seat category takes up less space than a seat of the first seat category;
• wherein:
• the first space for the first seat category and the second space for the second seat category are positioned laterally;
• and
• there is no clear demarcation between the wings and body of the aircraft along a leading edge of the aircraft.