Online grocer Ocado’s (OCDO) third quarter update (19 Sep) triggered a share price decline as boss Tim Steiner reported falling average order sizes and said costs would rise.

Customers spending less per order is negative for Ocado, particularly as the latest Kantar Worldpanel grocery share figures reveal sales gains for rivals including Tesco (TSCO), WM Morrison Supermarket (MRW), Aldi and Lidl over the 12 weeks to 10 September.