Following in the fatherhood footsteps of David Beckham, Jack Marshall began a stylish footwear brand geared toward lads and their cool 'papas' with his son

Halfway through our conversation, eight-year-old Jack Marshall springs up, hurries over to the open door into the rest of his south-west London home, and closes it. "Because of my mum," he explains as he plonks himself down again on his chair.

"In case she hears?" asks his father Andrew, slightly puzzled. Jack nods. This is clearly in Jack's mind a moment for men's talk. Or more precisely a moment for fathers and sons.