It turns out that dealing with 1,000 frantic bank staff a day can be inspiring. Or at least that’s how former HSBC receptionist Dézi Ollé sees it, looking back on her years at the bank's Canary Wharf headquarters.

Now a full-time mindfulness, meditation and yoga instructor for the City, the self-styled "yoga nutter" is trying to help some of those who seemed overwhelmed and overwrought in the years she worked as a receptionist. And demand is going up fast.