What’s the best way of checking ejection seats work? Shoot a volunteer into the air at 8,000ft at a speed of 320mph of course. Ken Ellis tells the remarkable story of Martin-Baker fitter ‘Benny’ Lynch’s selfless bravery

As these words appear on the computer screen, the counter on the Martin-Baker website recorded 7,567 lives saved using the world-renowned seats. Each soul represented by that statistic has many people to thank, not least James Martin and Valentine Baker, the founders of Martin-Baker Aircraft, now known as Martin-Baker (MB).