A booking hack has caused a stir online (Picture: Beata Zawrzel/NurPhoto via Getty Images)How much difference can an extra inch really make? It will give you an extra inch of legroom compared to sitting in rows six to 17 of the left-hand side of the plane.‘ The hack claims to get passengers one extra inch of legroom(Picture: Getty Images)In the caption of the post, Which? How generous of them,’ replied @sotostsorb, while @thrflowerandhtesea shared a laughing crying emoji, writing: ‘An extra inch.’ Because that will make so much difference…’POLL Poll Would you give this booking hack a go?