Worldpanel Plus should reach 80,000 shoppers ultimately, and identify motives behind any shopping trip, in any store. The Shoppix app will allow shoppers to record purchases and the motivations behind them in real time. The panellists photograph their receipts which then trigger surveys.

Kantar Worldpanel currently collects more than 64 million data points a year in the UK. 

Pete East, deputy managing director, Kantar Worldpanel UK and Ireland, said: "We have built a strong position in the marketplace by giving our clients a truly comprehensive understanding of the British consumer. 

"We believe that Worldpanel Plus is a transformative product. The breadth of information which this new panel will provide will support brands, manufacturers and retailers in manoeuvring through a dynamic business environment and allow them to make bolder business decisions."