By City AM reporter Ask business leaders in private what’s bothering them and the usual list is predictable enough: the markets, performance, getting the right team in place. Recently, we’ve heard a new one feature in more than a few conversations: whether London can keep its edge as the place to be for their talented young staff. The capital is increasingly unaffordable for twenty- and thirty-somethings, as yesterday’s house price affordability data demonstrates. As corporates have tightened their belts on pay-rises, rents and deposits have shot up. Our newspaper has lost not one but two tale…