Ken Cahill was in bullish form when he dialled in from Boston in March for The Currency’s weekly podcast. Even before Covid-19, his company SilverCloud Health was growing at a rate of knots, having developed more than 30 digital mental health programmes to help address issues including anxiety, depression and bipolar disorder. When the world went into a remote lockdown and with employers and healthcare providers looking for virtual ways to promote positive mental health, its growth accelerated further. Much of the growth was coming from the US, where Cahill has been based for four years, but he was also…