It’s 11 o’clock on Saturday morning and in a converted church on London’s Golborne Road, there’s a sense of ecstasy in the air. Sixty-two people of assorted ages – among them a middle-aged West Indian man in a purple shirt, some Spanish student types, and plenty of mid-career professional women – are sitting cross-legged on mats, chanting their last reverberant Om. But this is no Buddhist meeting. Nor a religious gathering. We’ve just completed a 90-minute yoga class…

