Join us in Leeds for a special memorial session for Professor Theodor J Stewart’s contributions to Operational Research. This session will feature discussions on scenario-focused decision analysis by Simon French, a review of Theo’s work by Murat Koksalan and Jyrki Wallenius, and an exploration of balance in multicriteria problems by Alec Morton and Lars Østerdal. Detailed location and time will be mentioned in the final programme. We look forward to your participation.