1 The role of intermediaries in establishing a sustainable supply chain Dr Rosanna Cole (corresponding author) University of Surrey, Guildford, GU2 7XH, UK r.cole@surrey.ac.uk 01483 683642 Professor James Aitken University of Surrey, Guildford, GU2 7XH, UK james.aitken@surrey.ac.uk 01483 300800