Marks & Spencer finance director Ian Dyson has spoken out in front of a crowd of shareholders and analysts at what was the company's first investor day in a decade, convincing many that he is the right man to take on the role of chief executive. The company is poised to appoint a new chief executive to replace the outgoing Sir Stuart Rose, who is due to become non-executive chairman before he leaves the company in July 2011. Dyson is among those widely tipped for the top spot, along with director of clothing Kate Bostock and head of food John Dixon. The three stood up on stage yesterday to convince investors of their capabilities, but one analyst named it 'the Ian Dyson show', CityA.M reports.