Cello Group plc company provides market research and direct response communications services, primarily to the charity, consumer, healthcare, public sector, and retail markets. Its Tangible division offers direct marketing, advertising, public relations, and response management services. Its Cello division provides qualitative and quantitative research, brand positioning and development, customer service strategy development, data acquisition and analysis, and competitive positioning consulting services. Customers have included the UK National Health Service, GlaxoSmithKline, Hewlett-Packard, and Tesco.