Max Naylor conducted research on online grocery shopping propositions and the current market. He found that only 4 of the 9 major online grocery retailers - Tesco, Sainsbury's, Asda, and Ocado - offer click and collect, home delivery, and delivery pass options. This gives them a competitive advantage over retailers like M&S, Waitrose, Iceland, and Morrisons that offer fewer options. The research also showed that customer habits are changing, driving grocers to adapt their propositions around value, convenience, and product range. Retailers not keeping up with these changes risk losing market share to more aggressive competitors.