You've heard of alpha males? Greg Lambrecht is an alpha-double-plus male. Clean-cut, almost male model looks, 44 but looks barely half that, he starts and runs companies that develop medical inventions. Spinal implants are his current speciality and, when I met him in London last month, he was on his way to South Africa to convince a large insurance company there that the considerable cost of his latest implant was worthy of reimbursement.